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MATHEMATICS

JAMB 2012 - Question 6

Mathematics 2012 JAMB Past Questions - Question 6: If 27^x+2 ÷ 9^x+1 = 3^2x, find x.

If 27^x+2 ÷ 9^x+1 = 3^2x, find x.

A: 3

B: 4

C: 5

D: 6

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Correct Answer

Explanation

27x+2÷9x+1=32x33(x+2)÷32(x+1)=32x33x+6÷32x+2=32x∴(3x+6)−(2x+2)=2xx+4=2x?x=4