Question

What is the relative maximum and minimum of the function?

f(x) = 2x2 + 28x - 8

Answer 1

x=-7

Answer 2

A. Minimum Value: -106 Range y > -106

B. Minimum Value: -7 Range y > -7

C. Minimum Value: 7
Range y > 7

D. Minimum Value: -106 Range y > -7

Answer 3

is it B

Answer 4

Well, since this is a parabola going upwards you just need to equal the dervative to zero and solve for x.\[\frac{ df }{ dx }=4x+28=0 \rightarrow x=\frac{ -28 }{ 4 }=-7\] Then solve for f.\[f=114\]Thats the minimum. The maximum is infinity because as x goes to either side of minus seven, f gets bigger and bigger.

Answer 5

That answer is wrong