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The function f(x) = 3.r4 + kx3 + x – 2 has an x-intercept at x = -2.
What is the value of k in the function f(r)?
O A
2
B.
13
2
C. -3
D. 7

The function fx 3r4 kx3 x 2 has an xintercept at x 2 What is the value of k in the function fr O A 2 B 13 2 C 3 D 7 class=

Respuesta :

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Answer:

Choose (A)

Step-by-step explanation:

f(x)=3x+kx³+x-2

f(x)=3(-2)⁴+k(-2)³+(-2)-2

=-8k+44

-8k=-44

k=44/8

k=11/2

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