The sum of the first ten terms of the A.P.`15,10,5,….is……

What is the sum of first 10 terms of the A.P. 15, 10 ,5 ….?

Choose the correct alternative from those given below each question: What is the sum of first 10 terms of the A.P. 15,10,5…?

Find the sum of the first 10 terms of the A.P. 6,4,2,…..

The sum of first 16 terms of the A.P.: 10,6,2,… is :

The sum of first 16 terms of the A.P.: 10,6,2,... Is

Find the sum of the first ten terms of the A.P. whose 4th term is -15 and 9th term is -30

Find the sum of the first ten terms of the A.P. whose 4th term is-15 and 9 th termis -30.

The sum of the first five terms of an A.P. and the sum of the first seven terms of the same A.P. is 167. If the sum of first 10 terms of this A.P. is 235, find the sum of its first twenty terms.

The sum oif the first ten terms of an A.P. is equal to 155, and the sum of the first two terms of a G.P. is 9. Find these progressionsif the first term of the A.P. equals the common ratio of the G.P. and the 1st term of G.P. equals the common difference of A.P.