Given F(x) = log8 x, find F(64). ...?

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Below is the solution:


f(64) = log8 64 
= log8 8^2 
= 2 log8 8 
= 2

Answer:

\(F(64)=2\)

Step-by-step explanation:

Given the funtion:

\(F(x)=log_8(64)\)

We need to find the value of the function at x=64:

\(F(64)=log_8(64)= z\)

Where z is the value we are trying to find. In order to find z, let's use the definition of the base of a log:

\(log_xy=z\Rightarrow x^z=y\)

So:

\(8^z=64\)

Express \(8^z\) as:

\(2^{3z}\)

And express 64 as:

\(2^6\)

Which leads to:

\(2^{3z}=2^6\)

Equate exponents of 2 on both sides:

\(3z=6\)

Solving for z:

\(z=\frac{6}{3} =2\)

Therefore:

\(F(64)=log_8(64)= z=2\)