Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 41) | ExamPlay

Mathematics for IGCSE & O level - Indices 2 (Section 1 - No. 41)

Solve the equation: 3^x-1 = 9

1

2

3

4

Explanation

3^x-1 = 3². Therefore, x - 1 = 2; x=3

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