∫dxx(logx)(loglogx)…(loglog…⏟8 times x) is equal to
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a
(loglog…⏟8 times x)+C
b
(loglog…⏟7 times x)+C
c
(loglog…⏟9 times x)+C
d
None of these
answer is C.
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Detailed Solution
Let I=∫dxx(logx)(loglogx)…(loglog…⏟8 times x)put , (loglog…⏟8 times x)=t⇒1(loglog…⏟7 times x)…(loglogx)(logx)xdx=dt∴ I=∫dtt=logt+C=(logloglog…⏟9 times x)+C