QUESTION IMAGE
Question
- write the expression $17^{\frac{3}{4}}$ using radicals.
- write each expression in the form $a^b$, without using any radicals.
- $\sqrt{5^9}$
- $\frac{1}{\sqrt3{12}}$
- write $32^{-\frac{2}{5}}$ without using exponents or radicals.
8.
match the equivalent expressions.
a: $8^{\frac{1}{3}}$ 1: $\frac{1}{8}$
b: $8^{-\frac{1}{3}}$ 2: $\frac{1}{4}$
c: $8^{-1}$ 3: $\frac{1}{2}$
d: $16^{\frac{1}{2}}$ 4: $1$
e: $16^{-\frac{1}{2}}$ 5: $2$
f: $16^0$ 6: $4$
Question 5
Step1: Recall the exponent - radical relationship
The formula for converting an expression with a fractional exponent to a radical is \(a^{\frac{m}{n}}=\sqrt[n]{a^{m}}\) (where \(n\gt0\), \(a\) is a real number, and \(m,n\) are integers). For the expression \(17^{\frac{3}{4}}\), we have \(a = 17\), \(m=3\) and \(n = 4\).
Step2: Apply the formula
Using the formula \(a^{\frac{m}{n}}=\sqrt[n]{a^{m}}\), we substitute \(a = 17\), \(m = 3\) and \(n=4\) into it. So \(17^{\frac{3}{4}}=\sqrt[4]{17^{3}}\)
Step1: Recall the radical - exponent relationship
The formula for converting a radical to an exponent is \(\sqrt[n]{a^{m}}=a^{\frac{m}{n}}\). For the expression \(\sqrt{5^{9}}\), the square root is the same as the \(\frac{1}{2}\)-th root, so \(n = 2\) and \(m=9\).
Step2: Apply the formula
Using the formula \(\sqrt[n]{a^{m}}=a^{\frac{m}{n}}\), we substitute \(a = 5\), \(m = 9\) and \(n = 2\) into it. So \(\sqrt{5^{9}}=5^{\frac{9}{2}}\)
Step1: Recall the radical - exponent and negative exponent rules
First, recall that \(\frac{1}{\sqrt[n]{a}}=\frac{1}{a^{\frac{1}{n}}}=a^{-\frac{1}{n}}\). For the expression \(\frac{1}{\sqrt[3]{12}}\), the cube root is the same as the \(\frac{1}{3}\)-th root, so \(n = 3\) and \(a = 12\).
Step2: Apply the rules
Using the rule \(\frac{1}{\sqrt[n]{a}}=a^{-\frac{1}{n}}\), we substitute \(a = 12\) and \(n = 3\) into it. So \(\frac{1}{\sqrt[3]{12}}=12^{-\frac{1}{3}}\)
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\(\sqrt[4]{17^{3}}\)