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Which equation shows equivalent forms of the expression 21 x 2-4 ?
2^1 ×2^−4 =2^−4=−8

2^1 ×2^−4 =2^−4=1/2^4=18

2^1 ×2^−4 =2^−3=1/2^3=18

2^1 ×2^−4 =2^−3=−8

Respuesta :

gmany

[tex]2^1\times2^{-4}=2^{1-4}=2^{-3}=\dfrac{1}{2^3}=\dfrac{1}{8}[/tex]

Used:

[tex]a^n\cdot a^m=a^{n+m}\\\\a^{-n}=\dfrac{1}{a^n}[/tex]

Answer: 2^1 × 2^-4 = 2^-3 = 1/2^3 = 1/8

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