- #1
thushanthan
- 32
- 0
Homework Statement
Given f(x)=sqrt(2x+2)
Question : Find the linear approximation of f(x) at a=7 AND use it to approximate sqrt(18).
Homework Equations
L(x)=f(a)+f'(a)(x-a)
The Attempt at a Solution
Using the linear approximation formula I am getting the value 6.75, but when I checked with calculator the value of sqrt(18) is 4.2426...
Did my approximation is wrong?