The value of (x>1),for which the sixth term in the expansion of
{ 2log2 √ (9^(x-1)+7) + 1/2(1/5)log2 (3^(x-1) +1) }7 is 84 is equal to
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https://www.meritnation.com/ask-answer/question/68-the-value-of-x-for-which-the-6th-term-in-the-expansion/binomial-theorem/10737303
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