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Question: \(\frac{\log_{2}(x + 3)}{x^{2} + 3x + 2}\), where [x] is the greatest integer less than or equal to ...

log2(x+3)x2+3x+2\frac{\log_{2}(x + 3)}{x^{2} + 3x + 2}, where [x] is the greatest integer less than or equal to x is

A

0

B

8/3

C

64/27

D

None of these

Answer

8/3

Explanation

Solution

For 2<x<3,[x3]=02 < x < 3 , \left[ \frac { x } { 3 } \right] = 0.

Hence limx2+(x33[x3]3)=233=83\lim _ { x \rightarrow 2 + } \left( \frac { | x | ^ { 3 } } { 3 } - \left[ \frac { x } { 3 } \right] ^ { 3 } \right) = \frac { 2 ^ { 3 } } { 3 } = \frac { 8 } { 3 } .