QUESTION IMAGE
Question
- $\frac{(2m^2)^{-1}}{m^2} =$
- $\frac{2x^3}{(x^{-1})^3}$
- $(a^{-3}b^{-3})^0$
- $x^4y^3 cdot (2y^2)^0$
- $ba^4 cdot (2ba^4)^{-3}$
- $(2x^0y^2)^{-3} cdot 2yx^3$
- $\frac{2k^3 cdot k^2}{k^{-3}}$
- $\frac{(x^{-3})^4x^4}{2x^{-3}}$
- $\frac{(2x)^{-4}}{x^{-1} cdot x}$
- $\frac{(2x^3z^2)^3}{x^3y^4z^2 cdot x^{-4}z^3}$
Problem 11: $\boldsymbol{\frac{(2m^2)^{-1}}{m^2}}$
Step 1: Apply negative exponent rule
Recall that $(ab)^n = a^n b^n$ and $(a^m)^n = a^{mn}$, also $a^{-n}=\frac{1}{a^n}$. So, $(2m^2)^{-1}=2^{-1}(m^2)^{-1}=\frac{1}{2}m^{-2}$.
Now the expression becomes $\frac{\frac{1}{2}m^{-2}}{m^2}$.
Step 2: Divide with same base (subtract exponents)
When dividing with the same base $a^m\div a^n = a^{m - n}$. Here, for the $m$ terms: $m^{-2}\div m^2=m^{-2 - 2}=m^{-4}$. And we still have the $\frac{1}{2}$ factor.
So, $\frac{1}{2}m^{-4}=\frac{1}{2m^4}$.
Step 1: Simplify the denominator
Using the power of a power rule $(a^m)^n=a^{mn}$, so $(x^{-1})^3 = x^{-1\times3}=x^{-3}$.
The expression is now $\frac{2x^3}{x^{-3}}$.
Step 2: Divide with same base (add exponents)
$a^m\div a^n=a^{m - n}$, so $x^3\div x^{-3}=x^{3-(-3)}=x^{6}$. Multiply by the coefficient 2.
So, $2x^{6}$.
Step 1: Apply zero exponent rule
Any non - zero number (or non - zero expression) raised to the power of 0 is 1. Since $a^{-3}b^{-3}=\frac{1}{a^3b^3}$ (assuming $a
eq0$ and $b
eq0$), then $(a^{-3}b^{-3})^0 = 1$.
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$\frac{1}{2m^4}$