Question on: WAEC Mathematics - 1997

Find the value of t for which \(\frac{64}{27} = (\frac{3}{4})^{t - 1}\)

A
-4
B
-2
C
11/3
D
2
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Correct Option: B

\(\frac{64}{27} = (\frac{3}{4})^{t-1}\)

\((\frac{3}{4})^t = \frac{64}{27} \times \frac{3}{4} = \frac{16}{9}\)

\((\frac{3}{4})^t = (\frac{9}{16})^{-1}\)

\((\frac{3}{4})^t = (\frac{3}{4})^{-2}\)

t = -2

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