Find the sum of n terms of an AP where `a_n = 5 - 6n` and n `in` N

Find the sum to n terms of the sequence {a_n} , where a_n=5-6n, n in N .

Find the sum to n terms of an A.P. whose nth terms is t_n=5+6n,n in N.

Find the sum of first n terms of an AP whose n^(th) term is 5-6n .find the sum of its first 20 terms

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

Find the sum of n terms of the sequence (a_n),w h e r e a_n=5-6n ,n in Ndot

Find the sum of n terms of the sequence (a_n),w h e r e a_n=5-6n ,n in Ndot

Find the sum of n terms of the sequence (a_(n)), where a_(n)=5-6n,n in N

Find the sum to n terms of an A.P.whose nth terms is t_(n)=5+6n,n in N

If the sum of n terms of an A.P is cn (n-1) where c ne 0 then find the sum of the squares of these terms.