If first term is 8 and last term is 20 common diffference is 2 . find the value of n when the series are in AP.

If first term is 8 and last term is 20 common difffence is 2. find the value of n when the series are in AP.

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

For an A.P. if the first term is 8 and the common difference is 8, then S_(n) =

For an A.P. if the first term is 8 and the common difference is 8, then S_(n) =

In an A.P. the difference between the last and the first terms is 632 and the commons difference is 4. Then the number of terms in the A.P. is

The sum of the first n terms of an AP whose first term is 8 and the common difference is 20, is equal to the sum of first 2n terms of another AP whose first terms is -30 and the common difference is 8. find n

The sum of the first n terms of an AP whose first term is 8 and the common difference is 20 is equal to the sum of first 2n terms of another AP whose first term is -30 and the common difference is 8. Find n.

The sum of the first n terms of an AP whose first term is 8 and the common difference is 20 is equal to the sum of first 2n terms of another AP whose first term is -30 and the common difference is 8 . Find n .

The first term of an A.P is 2 and last term is 59. Find the common difference if sum of all terms is 610 .

The first term of an AP is 148 and the common difference is -2. If the AM of first n terms of the AP is 125, then the value of n is