Question

1. What is the extremum of the function f(x) = x + 6x + 8?​

Answer 1

x=-8/7,Alternative form x=-1 1/7 ,x=1.142857

Explanation:

f(x)=x+6x+8

substitute f(x)=0

collect like terms.

0=7x+8

Move the variable to the left.

-7x=8

Divide both sides

x=-8/7