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Mathematics for IGCSE & O level - Indices 2 (Section 2 - No. 4)

If x-2 = 1/9, what is the value of x?
-3
3
-1/3
1/3

Тайлбар

x-2=1/x2 therefore 1/x2=1/9 hence x=3 or x=-3

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