" 15.The first three terms of an A.P.are "3y-1,3y+5" and "5y+1" respectively then find "y" ."

The first three terms of an A.P. are 3y -1, 3y + 5, and 5y+ 1 . Find y.

The first and the last terms of an A.P.are 5 and 45 respectively.If the sum of all its terms is 400, find its common difference.

4.If the first and last terms of an A.P.are 1 and 11 respectively and the sum of its terms is 30. find the number of terms in the A.P.

The first three terms of an A.P.respectively are 3y-1,3y+5 and 5y+1. Then,y equals -3( b) 4(c)5(d)2

The first three terms of an A.P. respectively are 3y-1,\ 3y+5 and 5y+1 . Then, y equals (a) -3 (b) 4 (c) 5 (d) 2

If the 5 th and 12 th terms of an A.P.are 30 and 65 respectively,what is the sum of first 0 terms?

The first three terms in the binomial expansion of (x+y)^n are 1,56 and 1372 respectively. Find the values of x and y.

The first three terms in the Binomial expansion of (x+y)^n are 1,56 and 1372 respectively . Find the value of x and y

The 26th,11 th and last term of an A.P.are 0,3,-(1)/(5) respectively.Find the common difference and the number of terms

If (1)/(x+y), (1)/(2y) , (1)/(y+z) are the three consecutive terms of an A.P. prove that x ,y,z are the three consecutive terms of a G.P.