SOLUTION: y = 1 - x + x^2/2! - x^3/3! + x^4/4! - ... then d^2y/dx^2 is equal to: a) -x b) -y c) x d) y

Algebra ->  Rational-functions -> SOLUTION: y = 1 - x + x^2/2! - x^3/3! + x^4/4! - ... then d^2y/dx^2 is equal to: a) -x b) -y c) x d) y      Log On


   

Question 976802: y = 1 - x + x^2/2! - x^3/3! + x^4/4! - ... then d^2y/dx^2 is equal to:
a) -x
b) -y
c) x
d) y
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
y = 1 - x + x^2/2! - x^3/3! + x^4/4! - ...
dy/dx=-1+x-x^2/2!+x^3/3!- ...
d2y/dx2=1 - x + x^2/2! - x^3/3! + ...
Looks like it equals the original y.