The range of the function f(x)=7−xPx−3 is
{1,2,3}
{1,2,3,4,5}
{1,2,3,4}
{1,2,3,4.5,6}
f(x) is defined when ⇒x−3≥0⇒x≥3,x−3≤7−x⇒2x≤10⇒3≤x≤5⇒x=3 or 4 or 5 Range ={f(3),f(4),f(5)}={4P0,3P1,2P2}={1,3,2}