Question

I need help on this problem

Answer 1

B

Explanation:

Where f(x) and g(x) intersect on the x- axis the value of y is zero

Equate either of the 2 functions to 0 and solve for x

Using f(x) = 8x² - 2, then

8x² - 2 = 0 ( add 2 to both sides )

8x² = 2 ( divide both sides by 8 )

x² =
`(2)/(8)` =
`(1)/(4)`

Take the square root of both sides

x = ±
`\sqrt{(1)/(4) }` = ±
`(1)/(2)`

Hence k =
`(1)/(2)` → B