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Question

If f(x)=log10x2, then the values of x for which f(x) is real is/are

A
2
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B
5
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C
0
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D
0.5
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Solution

The correct options are
A 2
B 5
f(x) is real when log10x2>0
x2>1
Therefore, x>1 and x<1
Clearly x=2 and x=5 satisfies this conditions.
Hence, option A and B.

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