Question (9/85)

Find the value of X if, `(a/b)^(X-1) = (b/a)^(X-3)`

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(A)  1/2

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(B)  1

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(C)  2

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(D)  7/2

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Question (10/85)

The value of expression: `((243)^0.13 xx (243)^0.07)/((7)^0.25 xx (49)^0.075 xx (343)^0.2)`

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(A)  3/7

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(B)  7/3

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(C)  10/7

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(D)  16/7

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