$\"\"$

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(a)

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The function is $\"\"$ .

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Rewrite the above function as $\"\"$ .

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Find $\"\"$ .

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Here $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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$\"\"$ .

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Thus, the point is on the graph of $\"\"$ is $\"\"$ .

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$\"\"$

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(b)

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The function is $\"\"$ .

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Rewrite the above function as $\"\"$ .

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Substitute $\"\"$ in $\"\"$ .

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$\"\"$

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Apply one-to-one property of exponential function : $\"\"$ if and only if $\"\"$ .

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$\"\"$

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Thus, the point is on the graph of $\"\"$ is $\"\"$ . $\"\"$

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(a) The point is on the graph of $\"\"$ is $\"\"$ .

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(b) The point is on the graph of $\"\"$ is $\"\"$ .