1
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
The value of the infinite product $${6^{{1 \over 2}}} \times {6^{{1 \over 2}}} \times {6^{{3 \over 8}}} \times {6^{{1 \over 4}}} \times ...$$ is
A
6
B
36
C
216
D
$$\infty$$
2
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If the nth term of an AP is $${{3 + n} \over 4}$$, then the sum of first 105 terms is
A
270
B
735
C
1409
D
1470
3
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
If p, q, r are in one geometric progression and a, b, c are in another geometric progression, then ap, bq, cr are in
A
AP
B
GP
C
HP
D
None of these
4
NDA 2015 Paper 2
MCQ (Single Correct Answer)
+2.5
-0.83
What is the sum of n terms of the series $$\sqrt 2 + \sqrt 8 + \sqrt {18} + \sqrt {32} + ...$$?
A
$${{n(n - 1)} \over {\sqrt 2 }}$$
B
$$\sqrt 2 n(n + 1)$$
C
$${{n(n + 1)} \over {\sqrt 2 }}$$
D
$${{n(n - 1)} \over 2}$$
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