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MATHEMATICS

JAMB 2001 - Question 35

Mathematics 2001 JAMB Past Questions - Question 35: If the gradient of the curve y =2kx² + x +1at X = 1 is 9, find k

Choose the correct answers from the options given.

If the gradient of the curve y =2kx² + x +1at X = 1 is 9, find k

A: 1

B: 2

C: 3

D: 4

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Correct Answer

Explanation

Y=2kx² + x+1; dy/dx = 4ky+1;at x =14kx +1=9;4k+1=9; 4k =8;k=2