- #1
Krypto78
- 21
- 0
Homework Statement
Given the equation f(x) = 2x+4/√x evaluate:
(1) f(0.5)
(2) f '(0.5)
Homework Equations
The Attempt at a Solution
(1) is simply to substitute the value 0.5 into the equation
(2) however i am assuming is to find the derivative of the equation
This is where i get stuck. Its so basic i know but i always seem to struggle with the simple things.
this is where I am at
f(x) = 2x+4/√x
= 2x/√x + 4/√x
The reciprocal of√x is x^1/2 so I am assuming the 2x/√x is 2x(x)^-0.5 and this is how far i get on this part of the equation.
The 4/√x I am sure = 4x^-0.5 and using the 'direct rule' becomes:-
(-0.5)(4)x^-0.5 - 1
converting to root from:-
-2x^-2/3
from there i get lost.
I would greatly appreciate a step by step solution.
Thanks guys