95. Which of the following when sim...
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95. Which of the following when simplified, does not reduces to unity? (a) log, 5 · log, 20 + logio 2 2log 2 + log 3 log 48 - log 4 (c) -log, log; VITO

JEE/Engineering Exams
Maths
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(a)   log105.log1020+(log60)2 =log5log10× log20log10+log2log10×log2log10 =1(log10)2  [log5×log20+log2×log2] =1(log10)2  [log5×log(5×22)+log22] =1(log10)2 log5×(log5+2log2)+(log2)2  1(log10)2 (log5)2+2(log 2) (log5) +(log 2)2 1log10

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