If nth term of the series 1.3 + 3.5 + 5.7 + ...... is _________.
n ( n + 2 )
n ( n + 5 )
( 2n - 1 ) ( 2n + 1 )
2n ( 2n - 1 )
Sum of cubes of first n natural numbers is _______.
None of these
The sum of the squares of first n natural numbers is _______.
The sum to n terms of 1, 8, 27, 64, ........ is ______.
The nth term of the series -3 + 6 - 12 + 24 - 48 .......... is _________.
( -1 )n * 3 * 2n-1
1n * 3 * 2n-1
3 * 2n+1
2 * 3n-1
If a, b, c are in G.P, then a/b = ?
b/c
b/a
a/c
c/a
The relation between A.M, G.M and H.M is _________.
A2 = GH
G2 = AH
H2 = AG
AG = H
If x, y, z are in A.P, then 2y = ?
x + z
x - z
x / z
xz
The sum of the series 1 + 1/2 + 1/22 + .......... is __________.
1
1/2
2
The 10th term of the A.P 13, 8, 3, -2, ......... is _____________.
-32
32
-57
-52
