[" Que."9" : "],[" Sum of first n terms of an A.P.whose last term is "],[" I and common difference is d,is "]

Sum of first n terms of an A.P. whose last term is l and common difference is d, is

Find the mean of first n terms of an A.P. whose first term is a and common difference is d.

What is the sum of first n terms of an A.P. whose first term is 'a' and common difference is 'd'?

Fill the gap The sum of n terms of an A.P. whose first term is a and common difference is d is

Find the sum of first 25 terms of an A.P.whose nth term is 1-4n

What is the n^(th) term of an A.P. whose first term is 'a' and common difference is 'd'?

Fill the gap The nth term of an A.P.whose first term is a and common difference is d is….

Find the mean and standard deviation of first n terms of an A.P.whose first term is a and common difference is d.

Find the mean and standard deviation of first n terms of an A.P. whose first term is a and common difference is d.

Determine mean and standard deviation of first n terms of an A.P. whose first term is a and common difference is d.