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Let’s check out your problem:
If
2
a
=
2
5
7
2^a = \sqrt[7]{2^5}
2
a
=
7
2
5
, what is the value of
a
a
a
?
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Math Problems
Grade 8
Evaluate radical expressions
Full solution
Q.
If
2
a
=
2
5
7
2^a = \sqrt[7]{2^5}
2
a
=
7
2
5
, what is the value of
a
a
a
?
Rewrite using exponents:
First, rewrite the equation
2
a
=
2
5
7
2^a=\sqrt[7]{2^5}
2
a
=
7
2
5
using exponents.
\newline
2
5
7
=
2
5
/
7
\sqrt[7]{2^5} = 2^{5/7}
7
2
5
=
2
5/7
Set exponents equal:
Now, we have
2
a
=
2
5
/
7
2^a = 2^{5/7}
2
a
=
2
5/7
. Since the bases are the same, we can set the exponents equal to each other.
\newline
a
=
5
7
a = \frac{5}{7}
a
=
7
5
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