A particle is simultaneously acted by two forces equal to 4 N and 3 N. The net force on the particle is

If two vectors $\overrightarrow{\mathrm{A}}\mathrm{and}\overrightarrow{\mathrm{B}}$ are given then the resultant ${\mathrm{R}}_{\max }$= A+B = 7N and ${\mathrm{R}}_{\min }$ = 4-3 = 1 N

i.e., net force on the particle is between 1 N and 7 N.