sum ((-1)^(k+1)*x^k)/((k+2)!*3^(2*k)) from k =0 to infinity
sum ((-1)\^{}(k+1)*x\^{}k)/((k+2)!*3\^{}(2*k)) from k =0 to infinity is the series (with my attempt at latex using some converter - comes up with latex error with the math square brackets around it..?)
What is the recursive formula for this that connects the nth term with the (n+1)th term?
Thanks in advance