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1.
If three numbers are in H.P., then the numbers obtained by subtracting half of the middle number from each of them are in
2.
The sum of the series 
is
is
3.
are the roots of the equation 
and 
are the roots of the equation 
form an increasing GP, then 
is equal to
are the roots of the equation and are the roots of the equation form an increasing GP, then is equal to
4.
equals
equals
5.
If 
then 
then
6.
Suppose 
are in AP and 
are in GP. If 
and 
, then the value of 
is
are in AP and are in GP. If and , then the value of is
7.
The sum upto 
terms of the series 
is
terms of the series is
8.
Let the sequence, 
form an AP, then 
is equal to
form an AP, then is equal to
9.
Let the positive numbers 
be in AP, then 
are
be in AP, then are
10.
Which one of the following is correct? If 
then
then