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Find the value of x: 5^2⁢(3^0 + 6^2⁢𝑥) = 25 25/36 - Mathematics

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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]

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B Nirmala Shastry Mathematics [English] Class 9 ICSE
Chapter 6 Indices
EXERCISE 6 | Q 12. (iv) | Page 67
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