" Find the sum of the first "25" terms of an A.P.whose "n^(th)" term is given by "t_(n)=7-5n

Find the sum of the first 25 terms of an A.P. whose n^(th) term is given by a_n=2-3n .

Find the sum of the first 25 terms of an A.P. whose nth term is given by a_(n)=7-3n

Find the sum of the first 25 terms of an A.P. whose nth term is given by a_(n)=2-3n

Find the sum of the first 25 terms of an A.P. whose n t h term is given by a_n=7-3n .

Find the sum of the first 25 terms of an A.P. whose n t h term is given by a_n=2-3n .

Find the sum of first 25 terms of an A.P.whose nth term is 1-4n

Find the sum of the first 16 terms of a sequence whose nth term is given by t_(n)=5n-3 , where n is a nautral number.

Find the sum of first n term of the A.P., whose nth term is given by (2n+1).

Find the sum of first n term of the A.P., whose nth term is given by (2n+1).