Question

PLEASE HELP!! if f(x)=x^1/2 + x^-2 what is the value of f(4)
1. 1 15/16
2. 2 1/16
3. 2 1/2
4. 4 1/16

Answer 1

you plug 4 in for x so your equation will look like, (4)^1/2 + (4)^-2 and then you solve.

Answer 2

it comes out to be 4, so what is the answer?

Answer 3

you should not get 4. 4^1/2 = 2. And 4^-1/2 =0.125 So your answer is 2.125. Which as a fraction is 2 1/16

Answer 4

thank you so much!!

Answer 5

Anytime!