Asked by Bhishma
If the sum of first four terms of GP is 30, sum of last four terms of GP is 960 and first term is 2 then find common ratio.
Answers
Steve
2(r^4-1)/(r-1) = 30
r=2
The last 4 terms don't matter, unless you are interested in how many there are.
r=2
The last 4 terms don't matter, unless you are interested in how many there are.
Bhishma
2(r^4-1)/(r-1) = 30
r=2
Cannot we say by comparing? there is no simplification? How can u say that direct answer is ?
r=2
Cannot we say by comparing? there is no simplification? How can u say that direct answer is ?