5^{2x-1} - 25^{x-1} = 2500 find value of x
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Consider, 52x – 1 – (52)x – 1 = 2500
⇒ 52x – 1 – 52x – 2 = 2500
⇒ 52x – 1 – (52x – 1)/5 = 2500 → (1)
Let 52x – 1 = a
Equation (1) becomes,
a – a/5 = 2500
⇒ 4a/5 = 2500
⇒ a = (2500 × 5)/4 = 3125
Therefore, 52x – 1 = 3125
⇒ 52x – 1 = 55
⇒ 2x – 1 = 5
⇒ 2x = 6
∴ x = 3
⇒ 52x – 1 – 52x – 2 = 2500
⇒ 52x – 1 – (52x – 1)/5 = 2500 → (1)
Let 52x – 1 = a
Equation (1) becomes,
a – a/5 = 2500
⇒ 4a/5 = 2500
⇒ a = (2500 × 5)/4 = 3125
Therefore, 52x – 1 = 3125
⇒ 52x – 1 = 55
⇒ 2x – 1 = 5
⇒ 2x = 6
∴ x = 3
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6
This should be your answer.
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