1
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
2
WB JEE 2010
MCQ (Single Correct Answer)
+1
-0.25

If sum of an infinite geometric series is $${4 \over {3}}$$ and its 1st term is $${3 \over {4}}$$, then its common ratio is

A
$${7 \over {16}}$$
B
$${9 \over {16}}$$
C
$${1 \over 9}$$
D
$${7 \over 9}$$
3
WB JEE 2010
MCQ (Single Correct Answer)
+1
-0.25

Sum of n terms of the following series 13 + 33 + 53 + 73 ......... is

A
n2(2n2 $$-$$ 1)
B
n3(n $$-$$ 1)
C
n3 + 8n + 4
D
2n4 + 3n2
4
WB JEE 2010
MCQ (Single Correct Answer)
+1
-0.25

G.M. and H.M. of two numbers are 10 and 8 respectively. The numbers are

A
5, 20
B
4, 25
C
2, 50
D
1, 100
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