DeterminantHard

Question

If a, b, c are pth, qth and rth terms of a GP, then is equal to -

Options

A.0
B.1
C.log abc
D.pqr

Solution

a = a0. r1p-1 ⇒  log a = (p - 1) log r1 + log a0
b = a0.r1q-1  ⇒  log b = (q - 1) log r1 + log a0
c = a0r1r-1 ⇒  log c = (r - 1) log r1 + log a0

= + log r1 = 0

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