If the first term of an arithmetic progression is 2 and common difference is 8 and the sum of n terms is 90, then the value of n is...

If the nth term of an arithmetic progression is 2n-1 , then what is the sum upto n terms?

It the sum of first 10 terms of an arithmetic progression with first term p and common difference q , is 4 times the sum of the first 5 terms, then what is the ratio p : q ?

If the sum of the first 100 terms of an arithmetic progression is -1 and the sum of the even terms is 1, then the 100^("th") term of the arithmetic progression is

The sum of first n terms of an arithmetic progression is 270. If common difference of the arithmetic progression is 2 and the first term is an integer, then number of possible values of n gt 2 is

If the arithmetic progression whose common difference is nonzero the sum of first 3n terms is equal to the sum of next n terms.Then,find the ratio of the sum of the 2n terms to the sum of next 2n terms.

Suppose the sum of the first m teams of a arithmetic progression is n and the sum of its first n terms is m, where mnen. Then the dum of the first (m + n) terms of the arithmetic progression is

If the nth term of an arithmetic progression is 3n+7, then what is the sum of its first 50 terms ?