$\"\"$

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The formula for recursively defined sequence is $\"\"$ and $\"\"$ .

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The expression is $\"\"$ .

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Find the value of $\"\"$ .

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Consider $\"\"$ .

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

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$

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$\"\"$ .

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$\"\"$ .

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$\"\"$ .

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$\"\"$

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$\"\"$ and $\"\"$ .