# 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 ...