If p>O, Q1 and S1, which of the following must be true ?
ক
PR>QS
খ
Q=S
গ
Q>S
ঘ
Q
ঙ
none of them
সঠিক উত্তর: PR>QS
imagine P=5, Q=-1, R=2,S=-2, PR=10, QS=2. so it proves PR is greater than QS