General Mock up tests - week 5 | Study Mode

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Question 1 Mathematics
A
-45 
B
-15 
C
15 
D
33 
E
45 
Explanation.
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T\(_{2}\) = ar = 6

T\(_{5}\) = ar\(^{4}\) = 48

\(\frac{T_5}{T_2}\) = \(\frac{ar^{4}}{ar}\) = \(\frac{48}{6}\)

= r\(^{3}\) = 8

r = 2

S\(_{n}\) = \(\frac{a((r^n) - 1)}{r - 1}\)

S\(_{4}\) = \(\frac{a((r^4) - 1)}{r - 1}\)

S\(_{4}\) = \(\frac{3((2^4) - 1)}{2 - 1}\)

= 3(16 -1)

= 45


Correct Option:
E
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Question 2 Mathematics
A
1-K 
B
\( \frac{k}{k - 1} \) 
C
\( \frac{k}{\sqrt{1 - k^2}} \) 
D
\( \frac{k}{1 - k} \) 
E
\( \frac{k}{\sqrt{ k^2 - 1}} \) 
Explanation.
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Correct Option:
C
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