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Question
Find the value of x:
`5^2(3^0 + 6^(2x)) = 25 25/36`
Sum
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Solution
Given expression is `5^2(3^0 + 6^(2x)) = 25 25/36`.
We need to find the value of x in the given expression.
Thus, `5^2(3^0 + 6^(2x)) = 25 25/36`
`25(1 + 6^(2x)) = 25 + 25/36`
`25(1 + 6^(2x)) = 25(1 + 1/36)`
Divide 25 on both sides.
`1 + 6^(2x) = 1 + 1/36`
By cancelling same terms on both sides, we have
`6^(2x) = 1/36`
62x = 6–2
Equating the powers with same bases.
2x = –2
`x = (-2)/2 = -1`
Therefore, the value of x in the given expression is –1.
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Chapter 6: Indices - EXERCISE 6 [Page 67]
