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8 Найдите значение выражения \( \sqrt{\frac{16 a^{14}}{a^{8}}} \) при \( a=3 \)

Ask by Sandoval Marshall. in Russia
Feb 03,2025

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Значение выражения при \( a = 3 \) равно 108.

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Давайте упростим выражение \( \sqrt{\frac{16 a^{14}}{a^{8}}} \). Сначала упростим дробь внутри корня: \[ \frac{16 a^{14}}{a^{8}} = 16 a^{14 - 8} = 16 a^{6} \] Теперь подставим это в корень: \[ \sqrt{16 a^{6}} = \sqrt{16} \cdot \sqrt{a^{6}} = 4 \cdot a^{3} \] Теперь подставим значение \( a = 3 \): \[ 4 \cdot (3^{3}) = 4 \cdot 27 = 108 \] Таким образом, значение выражения при \( a=3 \) равно \( 108 \).

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