$\"\"$

\

The statement is $\"\"$ .

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Condition(1): n = 1

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$\"\"$

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Condition (1) is satisfied.

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$\"\"$

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Condition(2): n = k

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$\"\"$

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n = k + 1

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$\"\"$

\

\

$\"\"$

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Substitute $\"\"$ .

\

$\"\"$

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$\"\"$

\

\

$\"\"$

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$\"\"$

\

$\"\"$

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$\"\"$

\

$\"\"$

\

$\"\"$ $\"\"$

\

The statement is "True".