The values of x satisfying the equation |x−1|log3x2−2logx9=(x−1)7 is / are
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a
13
b
1
c
2
d
81
answer is C.
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Detailed Solution
|x−1|log3x2−2logx9=(x−1)7Since L.H.S. > 0. So, x > 1∴ (x−1)log3x2−2logx9=(x−1)7⇒ x−1=1 or log3x2−2logx9=7⇒ x=2 or 2log3x−41log3x−7=0⇒ x=2 or 2log3x2−7log3x−4=0⇒ x=2 or log3x=−1/2,4⇒ x=2 or x=3−1/2,34⇒ x=2,81