(2x−1)3≥(3x−2)3≥(3x−2)4−(2−x)5
Here (2x−1)3≥(3x−2)3≥(3x−2)4−(2−x)5
⇒2x3−13≥3x4−24−25+x5
⇒2x3−3x4−x5≥−24−25+13
⇒40x−45x−12x60≥−39−24+2060
⇒−17x60≥−3460
Multiplying both sides by 60, we have
−17x≥−34
Dividing both sides by -17, we have
−17x−17≤−34−17⇒x≤2
Thus the solution set is (−∞,2].