$\"\"$

\

The exponential function is $\"\"$ .

\

Observe the graph :

\

The graph passes through the points $\"\"$ and $\"\"$ .

\

Substitute above points $\"\"$ and $\"\"$ in the function $\"\"$ to find the $\"\"$ value.

\

substitute point $\"\"$ in $\"\"$ .

\

$\"\"$

\

Substitute point $\"\"$ in $\"\"$ .

\

$\"\"$

\

Solve the equations $\"\"$ and $\"\"$ .

\

Multiply the equations $\"\"$ by $\"\"$ .

\

$\"\"$ .

\

Equate the equations $\"\"$ and $\"\"$ .

\

$\"\"$

\

$\"\"$ .

\

Logarithmic definition: $\"\"$ .

\

$\"\"$ .

\

$\"\"$

\

Consider $\"\"$ .

\

Substitute $\"\"$ in $\"\"$ .

\

$\"\"$

\

$\"\"$

\

Substitute $\"\"$ and $\"\"$ in $\"\"$ .

\

$\"\"$

\

The function is $\"\"$ .

\

$\"\"$

\

The function is $\"\"$ .