2
3---------------------------
2p+q
4 <2p<6<br>⁺3< q <4<br>---------------
7<2p+q<10<br>
-------------------------------------------------------------------------------------------------
q-2p
3< q <4<br> -4>-2p>-6 ⇒ -6<-2p<-4<br> ⁺ 3< q <4<br> ----------------------
-3
------------------------------------------------------------------------------------------------
5pq
2*3*5
-------------------
30<5pq <60<br>------------------------------------------------------------------------------------------------
p
²/3q
4 9<3q<12<br>----------------
1/9>1/3q>1/12 ⇒ 4 1/12<1/3q<1/9<br> -----------------------
4/12 1/3< p²/3q< 1