Write the common difference of an A.P. the sum of whose first`\ \ n` terms is `P/2n^2+Q n`

Write the common difference of an A.P.the sum of whose first n terms is (P)/(2)n^(2)+Qn

Find the common difference of the A. P, the Sum of whose first n terms is 2n + 5n^(2) .

Find the rth term of an A.P., the sum of whose first n terms is 2n+3n^2 .

Find the rth term of an A.P., the sum of whose first n terms is 3n^2+4n

Write the common difference of an A.P. whose n t h term is a_n=3n+7 .

Find the rth term of an A.P., sum of whose first n terms is 2n + 3n^(2) .

Write the expression for the common difference of an A.P. whose first term is a and n t h term is b .

In an A.P., if the first term is 22, the common difference is -4 and the sum to n terms is 64, find n .

In an A.P., if the first term is 22, the common difference is -4 and the sum to n terms is 64, find n .

The first term and common difference of an A.P. are respectively 4 and 2. If the sum up to n terms is 88, find n.