If three numbers a,b,c form a G.P., then
b2 = ac
b=a+c
b2 = a+c
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 A.M. between 5 and 22 is
13
14
13.5
14.5
Which term of the series 5,8,11,............... is 320.
106
120
160
102
26
27
28
None of these
Find the sum of 1+1/2+1/4+1/8+----------------------
1
2
3
4
The formula for nth term of an arithmetic progression is Tn =
a+nd
a+(n-1)d
2a+(n-1)d
Find the value of x for which x+9, x-6, 4 are the first three terms of a G.P.
1,15
0,16
2,4
3,16
The sum of 101+99+97+------------+47 is
2012
2072
1072
1015
If in a G.P. consisting of positive terms, each term equals the sum of the next two terms. Then the common ratio of this progression equals
