$\"\"$

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The given values $\"\"$ .

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

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

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First term $\"\"$ . $\"\"$

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Apply 2nd term of a geometric sequence $\"\"$ .

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

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

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

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

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

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

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

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Apply 4th term of a geometric sequence $\"\"$ .

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

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

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

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Apply 5th term of a geometric sequence $\"\"$

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

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

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

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The first five terms of geometric sequence are 1, 4, 16, 64 and 256.