Question

Use synthetic division to determine whether the number k is an upper or lower bound (as specified) for the real zeros of the function f.

k = -1; f(x) = 4x3 - 2x2 + 2x + 4; Lower bound?

Yes
No

Answer 1

Since k is negative, it'll be a lower bound if all the coefficients in the quotient function alternate sign.

Answer 2

okey thanks