Calculus (Answer Check)

88,560 results, page 85

  1. Calculus

    I don't get how you get this part: f' = (1-x)/(1+x)^3 f" = [(-1)(x+1)^3 - 3(1-x)(x+1)^2]/(x+1)^6 = [-(x+1)+3(x-1)]/(x+1)^4 ( I don't understand how you got this!!) = (-x-1+3x-3)/(x+1)^4 = (2x-4)/(x+1)^4
  2. college pre-calculus

    if 1-1/x=2-2/x, then 3-3/x=? A. -3 B. -1/3 C. 0 D. 1/3 E. 3 idek how to do it?
  3. Pre-Calculus

    find the inverse of g(x)=(x+7)^3+4
  4. Calculus

    Solve the differential equation f"(x)=x^2, f'(0)=3, f(0)=-1
  5. calculus

    integral sqrt(1-x^2) . sin^-1 x dx
  6. Calculus

    Integration with substitution The integral of f'(g(5x))g'(5x)dx
  7. Calculus

    The integral of sin(7x)cos(7x)dx
  8. Calculus

    would the derivative of f(x)=(7^x)(x^7) be f'(x)=(7^x ln7) (7x^6)?
  9. Calculus

    Evaluate: the integral from pi/8 to pi/6 csc2xcot2xdx
  10. calculus

    If u=(0,2,3) and v=(1,3,-1) find the projection of u onto v a) 1/3 u b) 3/11 v-> -> c) (1,1,-1) d) (1/3, 1, -1/3)
  11. calculus

    cos2x=secx find x
  12. Calculus 1

    How do you find the derivative of 1/3(x^2+2)^3/2 ? Please help
  13. Calculus

    Evaluate dy/dt for 2xy-2x+2y^3=-10 with the conditions dx/dt=-4 x=2 y=-1 dy/dt=?
  14. calculus(urgent pls)

    Integral of 1/[x^2(1+x^2)]
  15. Calculus

    f(x)=xe^-x^2. What interval is this function increasing.
  16. Calculus

    How do the constants 5, 4, and 12 in f(x) = 5x^2 - 4x + 12, affect the derivative? Thanks!
  17. Calculus AB

    Find the limit as x->infinity of ((3x+2)/(3x+4))^(3x+1)
  18. calculus

    what is the range for the function j(x)=5+sqrt of 2-x
  19. Calculus

    Differentiate each function with respect to x: F(x)=x/(x+1)^1/2
  20. Calculus 1

    Differentiate. f(x)=5sqrt(x)sinx
  21. Calculus

    What does it mean when the limit of f(c) doesn't exist?
  22. Calculus 1

    Find the derivative of the function. y=(e^3u -e^-3u)/(e^3u+e^-3u)
  23. differential calculus

    differentiate g(t)=3/sqrt(t)
  24. Multivariable calculus

    Find dy/dx x=te^t y=t+sint
  25. calculus

    If f(x) = 5ex cos x, find f '(x) and f ''(x).
  26. Calculus

    Calculate the approximation. L4, f(x)=cos^2 x , [pi/6, pi/2]
  27. Calculus

    Find c so y=4x+3 is tangent to the curve y=x^2+c
  28. Math 142 (calculus)

    Determine d^2y/dx^2 for y=(5x^5+7)^4
  29. Calculus

    Find the limit as x->infinity of (1+8/x)^x
  30. Calculus

    Evaluate the integral. cot3(4x) dx
  31. Calculus

    Calculate integral [0, infinity) xe^(-x) dx
  32. Calculus

    Given dy/dt=4y and y(2)=400. Find y(7).
  33. Calculus

    Find the derivative of f(x)=(2x)^(1/2)ln(15x)
  34. calculus

    Find the critical numbers x1 and x2 of y=(9x^2+3)/4x.
  35. Calculus pz help urgently

    Integrate:sinxcos(x-1/4.pi)dx
  36. Calculus

    How do you use u-substitution with 20sin(x^2/35)?
  37. Calculus

    Find the implicit differentiation for each. 1) x^2 = (x-y) / (x+y) 2) (x+y)^3 + (x-y)^3 = x^4 + y^4
  38. Calculus Plz Help

    If f(x)=x^4, compute f(-2) and f'(-2) f(-2)=___ <--- ?
  39. Pre-Calculus

    What are the holes of the function f(x) = (x^2 + 3x - 4)/(x^2 + 9x + 20)?
  40. High school calculus

    Calculate y when dy/dx = 1/(bx+5)^3
  41. calculus

    area between the curves y^2=4x , 7y=2x+20 , 2x+3y=0
  42. Calculus (easy)

    What is the polar form of (-2-2i)?
  43. Calculus

    Need help with a few questions
  44. Calculus

    solve the equation y'=(sqrt(x))/2y
  45. Calculus

    when x intercept -3, point P(2,5,7) and Q(1,10,14) how to find x,y and z?
  46. Pre-Calculus

    How do I find the domain of K(x) = x(32 - 2x)^2?
  47. Calculus

    lim (x--> infinidy) x^2/ln(x)= -1 0 1 e does not exist
  48. Calculus

    Find F'(x) for F(x)= integral[from 1 to x] of cos(t^3)dt
  49. Calculus

    lim x-->0 ((7-3x^5+x^2sinx)/(5cosx))
  50. Calculus

    Differentiate with respect to x 1/sin x
  51. Calculus 1

    Find the limit. lim x->0 (e^(6/x)+8x)^(x/2)
  52. calculus

    Find lim as (x,y) goes to (0,0) of (e^(-x^2-y^2)-1)/(x^2+y^2).
  53. calculus

    find the inverse of the matrix. [ 16 1 ] 1 16
  54. Integrals calculus

    7/x^2-8 does it give you 7ln(x^2-8)
  55. calculus

    Locate the discontinuities of the function y=(5)/(3+e^(1/x))
  56. calculus

    lim f(x)=? x->3- f(x); -3.7, -3.97, -3.997, -3.9997, ?
  57. Calculus

    Find the slope of x^2-16xy+y^2=1 at (1,1). Is this -1?
  58. Calculus

    Find dy/dx at the point (-3, 1) for the equation x = y^3-9x^2+5.
  59. Calculus

    Find the dot product of: <-1, 7> and <2, ¾>.
  60. Pre-Calculus

    Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v)
  61. Pre-Calculus

    What is the absolute value of: 3 - 8i? A. 9 B. 64 C. √55 D. √73
  62. Calculus

    find the angle between u=7i+2j and v=-4j
  63. calculus

    if y is a function of x and x=e^t/(e^t+1) show that dy/dt=x(1-x)dy/dx help me plz
  64. calculus

    how do you work out what ||u||2 is when you are given u:<-1,7> and v:<6,4>
  65. pre calculus

    Can you explain how to find (u • v)(u + v) when u <-1, 7> and v <4, -3>
  66. Calculus

    Find dz/dy for the following : z=(e^xy)+2ycos(xy-1)
  67. Calculus

    Convert to Polar: y/x = 4 A. r = 2 B. r = 16 C. Θ = 76 D. Undefined
  68. Calculus

    How do I find the limit of x/x as x approaches 0?
  69. calculus

    limx--->0 3sin 3x/4x would it be 9/4
  70. Calculus

    Differentiate each 1. Y= 1/x + 3/x^2 + 2/x^3 2. Y= x^5(1+ x)^5 3. Y= 4-x^2 / 2x+3 Can someone help me I'm lost
  71. Calculus

    M = log(E)-11.4/1.5 How do you express E in terms of M?
  72. Calculus

    What is y=-18x+13 in standard form?
  73. Calculus

    Solve the inequality |5+(2/x)|<1 solution is (-1/2,-1/3).
  74. Pre-Calculus 12

    2x^3 - 13x^2 + 32x - 13 = 0
  75. calculus

    evaluate the integral. from 0 to 4π t^2 sin(2t) dt
  76. Math - Calculus

    Compute the sum: 81 ∑ (2i-1) i=1
  77. calculus

    y=-sin^2 (1/x) find the derivative
  78. Calculus

    Find the anti derivative for 4/(x^2+1)
  79. Calculus

    consider the function f(x) = 9/x^3 -10/x^7 let F(x) be the antiderivatice of f(x) with F(1)=) then F(x)=
  80. Calculus

    reflexive property of ellipse
  81. Pre calculus- help!

    find (gof)(x) when f(x) = √x+1 and g(x) = x^2+3/x
  82. Calculus

    let f(x)=1x f(x)=1x and g(x)=x2 +5x.g(x)=x2 +5x. find (f⋅g)(x)(f⋅g)(x) Can someone help me with this I dont know how to do this
  83. Hellpppp calculus

    Solve by elimination. 0.1x + 0.3y = 1.5 0.6y + 0.2x =-1.2
  84. Calculus

    Given dy/dt=4y and y(2)=450. Find y(8).
  85. AP Calculus AB

    Suppose f(x)= x^5 - 10 and let h(x) be the inverse of f. Find h'(22).
  86. AP Calculus

    Find x. lim (sin(x))^x x-->0
  87. Calculus

    What is the Taylor series generated by g(x) = x^3-2x+2 at a=5?
  88. Calculus

    Find dy/dx for implicit differentiation y^2-xy+x^2=7
  89. Calculus

    Find f. f ''(x) = −2 + 12x − 12x2, f(0) = 9, f '(0) = 14
  90. Calculus

    Find f. f ''(θ) = sin(θ) + cos(θ), f(0) = 4, f '(0) = 2
  91. Science - Please Check My Answers

    Please help me with the following: Which is usually the best way to present or communicate inferred data? A. in a bar graph B. in a data table C. in a simple diagram D. in a written paragraph I know the answer isn't C or D(I got C wrong), but now I think the answer is B. Is ...
  92. Calculus 1

    Water is leaking out of an inverted conical tank at a rate of 9,500 cm^3/min at the same time that water is being pumped into the tank at a constant rate. The tank has height 6 m and the diameter at the top is 4 m. If the water level is rising at a rate of 20 cm/min when the ...
  93. Physics - Inelastic Collision ( check + help)

    A billiard ball of mass 0.55kg moves with a velocity of 12.5m/s towards a stationary billiard ball of the identical mass and strikes it with a glancing blow. The first billiard ball moves of at an angle of 29.7deg clockwise from its original direction, with a velocity of 9.56m...
  94. Chemistry

    calories given off when 85g of water cools from 48C to 23C. Express your answer using two significant figures. I know the answer is 2100 cal, but I just need to know why the answer is a positive value instead of negative, when it is supposed to be cooling down.
  95. Quick chemistry check

    Please check each of these mole statements. Correct me if I'm wrong! 1. 59g of hydrochloric acid (HCL)=____moles I got 1.6 moles 2. 4.6 moles of sodium hydroxide (NaOH)=___ grams I got 184 grams 3. 35.0 of sulfuric acid (H2SO4)=__ f.u sulfuric acid I got 2.15x10^25th power ...
  96. Sounds

    Seriously, I would love to know the answer to this question, will someone please answer it!!! What is quick back-and-forth motions repeated over and over? That wasn't a answer, I NEED AN ANSWER!!! wave? Pressure wave? Sound wave? Transverse wave? I think they're thinking of ...
  97. French

    Could you check these thanks. Part 1: Directions: Ask questions in 2 other ways by replacing the underlined words with où, d'où, comment, qui, avec qui, quand, à quelle heure, combien de, pourquoi, quoi/que/qu'est-ce que. (Note: UNDERLINED WORDS WILL BE IN PARENTHESIS) 1. ...
  98. Calculus

    A car leaves an intersection traveling west. Its position 5 sec later is 22 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 5 sec later is 27 ft from the intersection. If the speed of the cars at that ...
  99. help!!!! i forgot how to do this!!!

    A veterans group gave out 1000 small american flags at the 4th of july parade.They paid $355 for the flags.What was the cost of each flag? You need to divide $355 by 1000. Notice that the price for each flag is less than $1.00. If you'd like to post your answer here, we'll be ...
  100. english check answer

    To run a four-minute mile, excellent physical condition is important. Phrase fragment Dangling modifier (******) Run-on sentence Misplaced modifier Next ones is underlined words so I put * around them *The dog ate the shoe* that was lying on the closet floor. Noun clause ...
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