1 + 2 + 3 +........30 =
465
930
900
500
If in A.P Sn = Pn2 and Sm= pm2 where S denotes the sum of r terms of the A.P then Sp is equal to
1/2 p3
mnp
p3
(m+n)p2
Find the 5th term in the sequence a1 = 3, a2 = 3 and an = an-1 + an-2 ; a>2
6
9
15
24
8th term of the A.P 9, 13, 17, 21.....is
28
41
45
37
nth term of the following sequence ak, ak3, ak5.......is
akn
ak2n-1
ak2n
akn+1
If 2x + 1, x2 + x + 1 and 3x2 - 3x + 3 are consecutive terms of an A.P then x =
1, 2
2, 3
3, 4
5, 6
Common ratio of G.P am-n, am, am+n.........is
am
a-m
an
a-n
nth term of the sequence 2, -4, 8, -16 is
an = 3an-1 + 1
an = n(n-3)/n+4
an = n2 + 1
an = (-1)n-12n
Next term in the series 3/16 + 1/18 + 1/12 +.........is
1/24
1/27
1/18
1/29
The sequence an = 3n - 2 is an A.P, then a and d are
1, 4
4, 7
1, 3
7, 10
