If a^(x-1) . a^(x+1) = a^10 then x is?
- 5
- 3
- 1
- None of these
Explanation
Use law of exponents: a^m · a^n = a^(m+n)
a^(x-1) · a^(x+1) = a^[(x-1) + (x+1)] = a^(2x)
Given a^(2x) = a^10
Bases are same, so exponents must be equal: 2x = 10
x = 10/2 = 5
Last verified on 08-06-2026
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