Question

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

Answer 1

Choose (A)

Explanation:

f(x)=3x⁴+kx³+x-2

f(x)=3(-2)⁴+k(-2)³+(-2)-2

=-8k+44

-8k=-44

k=44/8

k=11/2

Answer 2

See the picture below