hint: use induction on n, and compare derivatives
P(n) says "1+x+x2/2!+...+xn/n!"
P(1)=1+x1/1!=1+x so P(1) is true
The Attempt at a Solution
induction is probably my worst type of proof, i can't wrap my head around how to do it. apparently there is some some taylor series that goes with this, but we haven't done those yet. can someone please help?