Find the indicated term (or terms) in each of the following sequences : `1,-2,4,-8,……,T_10`

Find the indicated term(s) of the following A.P.' s : a=3 ,d=2, a_10, a_n .

Find the indicated term(s) of the following A.P.' s : -1,-2-3,-4, .........., t_100 .

Find the indicated term(s) of the following G.P.'s : 12, 8, 16/3, ………….., t_(6), t_(10) .

Find the sum of indicated number of terms of the following A.P.’s : 2, 4, 6, ......., 100 terms.

Find the sum of indicated number of terms of the following A.P.’s : 5, 2, -1, - 4, -7, ......., n terms.

Find the sums of the indicated number of terms of the following geometric progressions : 2,-1/2,1/8 , ........., n terms, 12 terms.

Find the sums of the indicated number of terms of the following geometric progressions : 1,1/3,1/9 .........., n terms, 5 terms.

Find the sum of indicated number of terms of the following arithmetic progression : 16, 11, 6,..........., n terms, 23 terms.

Find the indicated term(s) of the following A.P.' s : n-1, n-2, n-3, ............. , a_m .

Find the indicated terms in the following : a= 1, r= 1.2 , t_4, t_n .