Please check what you wrote
what is a and what is r in
a + a r + a r^2 + a r^3 ......
The 1st term of an infinite GP exceed s the 2nd term. Buy 2 and its sum is 50 find the series
2 answers
If I can inject a little sense into that, how about
ar = a+2
a/(1-r) = 50
That has no real solution, but if you want a sum of -50, you can try
a = -10
r = 4/5
-10, -8, -32/5, -128/25, ...
ar = a+2
a/(1-r) = 50
That has no real solution, but if you want a sum of -50, you can try
a = -10
r = 4/5
-10, -8, -32/5, -128/25, ...