# Find a number k such that the function f(x)=11x^3+kx^2−8x+k contains the point (1,8)?

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- 2 months ago
f(1) = 8

8 = 11 * 1^3 + k * 1^2 - 8 * 1 + k

8 = 11 - 8 + k + k

8 = 3 + 2k

5 = 2k

5/2 = k

It's that easy.

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- alexLv 72 months ago
contains the point (1,8) ---> f(1) = 8

set up an equation then solve for k

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- Anonymous2 months ago
You have been granted permission to solve. Get to work.

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