$\"\"$

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The values are $\"\"$ .

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Apply 3rd term of a geometric sequence formula $\"\"$ .

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Subtract power: $\"\"$ )

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$\"\"$ (Evaluate power: $\"\"$ ) $\"\"$

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Apply division property of equality: a = b then $\"\"$ .

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$\"\"$ (Divide each side by 0.25)

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$\"\"$ (Cancel common terms)

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$\"\"$ (Divide: $\"\"$ ) $\"\"$

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Apply nth term of a geometric sequence formula $\"\"$ .

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$\"\"$ (Substitute $\"\"$ )

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$\"\"$ (Subtract power: $\"\"$ )

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$\"\"$ (Evaluate power: $\"\"$ )

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$\"\"$ (Multiply: $\"\"$ ) $\"\"$

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The value of $\"\"$ .