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Mathematics, 25.02.2021 14:00 lucky1silky

Simplify and express the result in power notation with positive exponent (3^-7 ÷ 3^-9) × 3^-4

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Need full workings!!​

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Simplify and express the result in power notation with positive exponent (3^-7 ÷ 3^-9) × 3^-4
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