Question

IN the circuit shown in the figure??

Answer 1

Note the polarity of the two batteries. The batteries are in series with a total voltage of:
2.5 + 3.4 = 5.9V
The current through R1 which has the combined voltage of the two batteries in series across it is: 5.9/3.4 = 1.735 amps

Answer 2

so R1 got when we solve the right part of circuit ?

Answer 3

The presence of R2 in the circuit does not affect current through R1. If R2 was removed the current in R1 would stay the same.

Answer 4

ok, thanks :)

Answer 5

You're welcome.