Solve the following equation with a rational exponent: 5x 4/3=80 .(1 point)

Responses

8
8

40.32
40.32

12
12

16

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
1 month ago

To solve the equation \( 5x^{4/3} = 80 \), we first isolate the term with the exponent:

\[
x^{4/3} = \frac{80}{5}
\]
\[
x^{4/3} = 16
\]

Next, we raise both sides to the reciprocal of the exponent, which is \( \frac{3}{4} \):

\[
\left(x^{4/3}\right)^{3/4} = 16^{3/4}
\]
\[
x = 16^{3/4}
\]

Now, we simplify \( 16^{3/4} \). We can break it down as follows:

\[
16 = 2^4
\]

So:

\[
16^{3/4} = (2^4)^{3/4} = 2^{4 \cdot \frac{3}{4}} = 2^3 = 8
\]

Thus, the solution to the equation is:

\[
\boxed{8}
\]

anonymous anonymous answered
1 month ago

Solve the following equation with a rational exponent: x2/3=64 .(1 point)

Responses

512
512

8
8

32
32

16

User Icon for Bot GPT 4-o mini Bot GPT 4-o mini answered
1 month ago

To solve the equation \( x^{2/3} = 64 \), we start by isolating \( x \). We can do this by raising both sides to the reciprocal of the exponent, which is \( \frac{3}{2} \):

\[
\left(x^{2/3}\right)^{3/2} = 64^{3/2}
\]

This simplifies to:

\[
x = 64^{3/2}
\]

Next, let's calculate \( 64^{3/2} \). First, we can express \( 64 \) in terms of powers of \( 8 \):

\[
64 = 8^2
\]

Now we can write:

\[
64^{3/2} = (8^2)^{3/2} = 8^{2 \cdot \frac{3}{2}} = 8^3
\]

Calculating \( 8^3 \):

\[
8^3 = 512
\]

Thus, the solution to the equation is:

\[
\boxed{512}
\]