Which expression is equivalent to open paren 4 x cubed close paren times 2 x to the negative 4 power ?
Answer
A
8 over x
B
128 over x
C
4 over x
D
1 over 4 x
Explanation
Multiply the coefficients: 4 × 2 = 8. For the powers of x, add the exponents: x³ × x⁻⁴ = x³⁻⁴ = x⁻¹, which equals 1/x. Therefore, the expression is 8/x, choice A.
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