Q. If correlation $n = 2002$, evaluate $\frac{1}{\log_{2}{n!}} + \frac{1}{\log_{3}{n!}} + \frac{1}{\log_{4}{n!}} + ... + \frac{1}{\log_{2002}{n!}}$

A) 1
B) 2
C) 3
D) 4
Explanation

(a)
$\frac{1}{\log_{2}{n!}} + \frac{1}{\log_{3}{n!}} + \frac{1}{\log_{4}{n!}} + ... + \frac{1}{\log_{2002}{n!}}$
$= \frac{\log 2}{\log{n!}} + \frac{\log 3}{\log{n!}} + ... + \frac{\log 2002}{\log{n!}}$
$= \frac{\log{(2.3.4\ldots 2002)}}{\log{n!}}$
$= \frac{\log{2002!}}{\log{n!}}$
$= \frac{\log{2002!}}{\log{2002!}} = 1\ \ \ \ \ \ \ \ \ \ \ \ \ \ \lbrack\because n = 2002,$ given]

Dr. Abubacker
Reviewed by Dr. Abubacker

Physics Educator & NEET/JEE Specialist

Ph.D. in Physics with 19+ years of teaching experience.