ax+by=1a3+b5=1⇒b=a−35a,a>3 
A=21ab=21a(a−3)5a=25⋅a−3a2 =25(a−3a2−9+9)=25(a+3+a−39)=25(a−3+a−39+6)≥30
JEE Main 2024 — Mathematics Calculus
A variable line L passes through the point (3,5) and intersects the positive coordinate axes at the points A and B. The minimum area of the triangle OAB, where O is the origin, is :
Held on 9 Apr 2024 · Verified 6 Jul 2026.
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