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

Write the common difference of an A.P. whose nth term is x n+ydot

Write the common difference of an A.P.whose nth term is a_(n)=3n+7.

Write the common difference of an A.P.Whose nth term is a_n=3n+7

Determine an A.P. whose nth term is a_n=3n^2+5n .

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

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

Write the expression a_n-a_k for the A.P. a ,\ a+d ,\ a+2d ,\ ddot Hence, find the common difference of the A.P. for which 11 t h term is 5 and 13 t h term is 79

Find the sum of n terms of an A.P. whose n t h terms is given by a_n=5-6n .

Write the expression a_n-a_k for the A.P. a ,\ a+d ,\ a+2d ,\ ddot Hence, find the common difference of the A.P. for which 20 t h term is 10 more than the 18 t h term.