Show that the sequence defined by `a_n=2n^2+1` is not an A.P.

Show that the sequence defined by a_(n)=3n^(2)-5 is not an A.P.

Show that the sequence defined by a_(n)=2n^(2)+1 is not an Adot P.

Show that the sequence defined by a_(n)=5n-7 is an A.P.find its common difference.

Show that the sequence defined by a_(n)=4n+5 is an AP .Also,find its common difference.

Show that the the sequence defined by T_(n) = 3n^(2) +2 is not an AP.

Show that the sequence defined by T_(n) = 3n+5 is an AP. Find the common difference .

Is the sequence defined by a_(n) = 3n^(2) + 2 an A.P. ?

Show that the sequence defined by a_(n)=(2)/(3^(n)),n in N is a G.P.

Show that the sequence t_(n) defined by t_(n)=2*3^(n)+1 is not a GP.

Show that the sequence defined by a_(n) = m + (2n - 1) d, where m and d are constants , is an A.P. Find its common difference .