The sum of the series 5-10+20- ----------------------- to 6 terms is
104
- 106
105
- 105
The sum of 101+99+97+------------+47 is
2012
2072
1072
1015
The harmonic mean of two numbers is 4 and the arithmetic and geometric means satisfy the relation , the numbers are
6,3
5,4
-3,1
The formula for nth term of an arithmetic progression is Tn =
a+nd
a+(n-1)d
2a+(n-1)d
7th term of 2,4,8, -------------------- is
120
118
125
128
320
322
324
326
The second term of a G.P. is 18 and the fifth term is 486. Find the first term
3
6
2
4
Which term of the series 5,8,11,............... is 320.
106
160
102
Sum of n terms of a geometric series is
None
Find the sum of 1+1/2+1/4+1/8+----------------------
1
