Originally Posted by

**akhayoon** Question was

evaluate the 4th taylor polynomial of $\displaystyle \sqrt{3+x^{2}}$ around a=-1

my answer was

$\displaystyle f4(x)=2-\frac{-(x+1)}{2}-\frac{(x+2)^{2}}{(8)2!}-\frac{3(x+1)^{3}}{(32)3!}-\frac{15(x+1)^{4}}{(128)4!}$

the marker notes however that there was something missing in the 3rd term

that the 3 in the fourth term was wrong, and that the 15 and 128 in the last term is wrong as well...

but after looking at my derivatives I can't figure out why this is???