Teaching BPSC 4.0 बिहार उच्च माध्यमिक शिक्षक भर्ती (PGT) Mock Test Mathematics Differential Calculus Applications of Derivatives
Two positive numbers x and y such that x + y = 60 and xy3 is maximum are :
1
x = 30, y = 30
2
x = 20, y = 40
3
x = 15, y = 45
4
More than one of the above
5
None of the above