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1.
The value of 7 
is
is
2.
The sum of first two terms of an infinite G.P. is 1 and every term is twice the sum of the successive terms. Its first term is
3.
If 
then 
equals to
then equals to
4.
If the sum of first 
natural numbers is 
times the sum of their cubes, then the value of is
natural numbers is times the sum of their cubes, then the value of is
5.
If 
geometric means between 
and 
be 
and a geometric mean be 
, then the true relation is
geometric means between and be and a geometric mean be , then the true relation is
6.
Consider an infinite geometric series with first term and common ratio 
. If its sum is 4 and the second term is 
, then
and common ratio . If its sum is 4 and the second term is , then
7.
The sum of terms of the series 
will be
terms of the series will be
8.
If the 
th term of HP be and th term be , then the th term will be
th term of HP be and th term be , then the th term will be
9.
In the expansion of 
, the constant term is
, the constant term is
10.
The value of 
is
is