5) The fifth term of an A.P exceeds twice the second term by 1. The tenth term exceeds twice the fourth term by 3 Find (i) the first term. (ii)common difference (iii)the sum of first twenty-five terms.

Answer 1

a+4d = 2(a+d)+1
a+9d = 2(a+3d)+3
solve for a and d, and then you want
S25 = 25/2 (2a+24d)