math

posted by .

find the eqt. of tangent to the curve y=-x^2+2x-10.[ans:y=2x-10]
but my ans is y=-9. if im wrong could you show the calculation.

  • math -

    At what point along the curve is the tangent contact made?

    Based upon the answer, it is where dy/dx = 2

    dy/dx = -2x + 2 = 2, so x = 0 at the point of contact. That requires y = -10 at that point.

    So y = 2x - 10 is the answer IF you are talking about the line tangent to the curve at x = 0.

    You omitted an important part of the problem statement.

  • math -

    in the question it say: at the point where the curve cuts the y-axis

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. math

    a straight line passing through the origin with slope m cuts the circle x^2+y^2-4x-2y-4=0 at A(a,b) and B(b,c). A. Find a quadratic equation whose roots are a and c ans: (1+m^2)x^2-(2m+4)x-4=0 B. if P is the mid-point of AB, find the …
  2. math

    find the eqt. of the tangent to the curves at (1,2). y^3+y^3=9(xy-1) [ans: y=5x-5] could some1 show me the calculation work bcus my ans is y=(6x+4)/5.
  3. math

    find the eqt. of tangent to the curve y=-x^2+2x-10 @ the point where the curve cuts the y-axis.[ans:y=2x-10] how do i do this because they didn't give me the point...?
  4. chem

    an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work …
  5. Math

    How to d/dx y= (9+((x-9)/6)^1/5)^1/2 ? Hope u can give me the way how to calculate it. ^^ I got 1/60 ((x-9)/6) ^ (-9/10), i think my answer is wrong because i check at wolfram website the ans is differrent from mine (sorry i didn't
  6. math

    use implicit differentiation to find dy/dx and then d^2y/dx^2. y^2=ye^x^2+2x ans for dy/dx= [2(xye^x^2 + 1)]/(2y-e^x^2) after that i don't know how to proceed. can someone show me the steps(x need for calculation) and final answer. …
  7. math

    Finf the volume of the solid generated by revolving the region bounded by the curve. x=2/(y+1), x=0, y=0, y=3, about y-axis. My ans is pie unit^3. Is it correct?
  8. Math

    Let log 2 = a, log 3 = b and log 7 = c. Express the indicated logarithm in terms of a, b, and c. 1-log3 5 (3 is the subscript of the log) ans:(1-a)/b, i need someone to show me the step bcus my ans is different from the given ans. …
  9. 6th grade math

    Can you check these problems, please? Translate each phrase into algebraic expression. 1. 5 more than D Ans: 5 + D 2. Twice a number W Ans: 2*W 3. Product of 60 and W Ans: 60*W 4. A number, N, decreased by 18 Ans: N - 18 5. 14 minus
  10. 7th grade math (probability)

    Can you check these, please? Ten cards numbered 1 through 10 are mixed together and then one card is drawn. Find the probability of each event. Write each answer as a fraction, percent, and decimal. 14. P(less than 5) = 4/10 = 2/5

More Similar Questions