Find the Second Taylor Polynomial for F(x) = $\frac { 1 } { \sqrt { x + 4 } }$

Short Answer

Find the second Taylor polynomial for f(x) = $\frac { 1 } { \sqrt { x + 4 } }$ at x = 0 and use it to approximate $\frac { 1 } { \sqrt { 4.1 } }$ .
Enter just a real number rounded off to two decimal places.