LCKurtz , i can't understand your post.I know the closed form of geometric series =\frac{FirstTerm} {1 - CommonRatio}
CommonRatio = termn / termn-1
but in my problem , the 'CommonRatio' isn't fixed
term4/term3 not equal to term3/term2
Please please, I need solution
hello every one
I have this summation in my book
infinity
\sum k*z-k
k=0
my solution:
infinity
\sum k*z-k = z-1+2z-2+3z-3+...
k=0
please i want the closed form (step-by-step)