1
WB JEE 2009
MCQ (Single Correct Answer)
+1
-0.25

If three positive real numbers a, b, c are in A.P. and abc = 4 then the minimum possible value of b is

A
23/2
B
22/3
C
21/3
D
25/2
2
WB JEE 2009
MCQ (Single Correct Answer)
+1
-0.25

For what value of m, $${{{a^{m + 1}} + {b^{m + 1}}} \over {{a^m} + {b^m}}}$$ is the arithmetic mean of a and b?

A
1
B
0
C
2
D
None of these
3
WB JEE 2009
MCQ (Single Correct Answer)
+1
-0.25

The coefficient of xn, where n is any positive integer, in the expansion of (1 + 2x + 3x2 + ....... $$\infty$$)1/2 is

A
1
B
$${{n + 1} \over 2}$$
C
2n + 1
D
n + 1
4
WB JEE 2009
MCQ (Single Correct Answer)
+1
-0.25

The sum of the infinite series $$1 + {1 \over {2!}} + {{1\,.\,3} \over {4!}} + {{1\,.\,3\,.\,5} \over {6!}} + \,....$$ is

A
e
B
e2
C
$$\sqrt e$$
D
1/e
WB JEE Subjects
EXAM MAP
Medical
NEET
Graduate Aptitude Test in Engineering
GATE CSEGATE ECEGATE EEGATE MEGATE CEGATE PIGATE IN
CBSE
Class 12