The answer is: [B]: " 7 " .
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Note: Given: " x³ = 343 " ; Solve for "x" ;
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∛(343) = 7 .
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7³ = 7 × 7 × 7 = 343 .
7³ = 7 × 7 × 7 =
→ 7³ = 7 × 7 × 7 = 49 * 7 = 343 .
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