(1)

Step 1:

Find the Thevinins equivalent resistance.

1.Open the load resistor.

2.Open Current Sources and Short Voltage Sources.

3.Calculate the Open Circuit Resistance. The resultant open circuit resistance is the thevenin Resistance (R_TH).

Redraw the circuit :

$\"\"$

Observe the circuit,

The Resistors $\"\"$ and $\"\"$ are in series.

$\"\"$

$\"\"$ .

Above series resultant comesin paralle with the resistance $\"\"$ .

$\"\"$

$\"\"$ .

Above resultant is in series with resistance $\"\"$ .

Equivalent reistance is $\"\"$ .

$\"\"$ .

Thevinins equivalent resistance is $\"\"$ .