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JEE Main 2026 · 2 Apr · Shift 2, Mathematics question 24

If the area of the region bounded by 16x2−9y2=14416x^2-9y^2=144 and 8x−3y=248x-3y=24 is A, then 3(A+6log⁡e(3))3\left(A+6\log_e(3)\right) is equal to ________.

Answer and worked solution

Official answer: 24

Intersections. The hyperbola x29−y216=1\frac{x^2}9-\frac{y^2}{16}=1 meets y=8x−243y=\frac{8x-24}3 where x2−8x+15=0x^2-8x+15=0: at (3,0)(3,0) and (5,163)\left(5,\frac{16}3\right). Between them the hyperbola lies above the line.

Area.
A=∫35[43x2−9−8x−243]dx=43(10−92ln⁡3)−163=8−6ln⁡3,A=\int_3^5\left[\frac43\sqrt{x^2-9}-\frac{8x-24}3\right]dx=\frac43\left(10-\frac92\ln3\right)-\frac{16}3=8-6\ln3,
using ∫x2−9 dx=x2x2−9−92ln⁡∣x+x2−9∣\int\sqrt{x^2-9}\,dx=\frac x2\sqrt{x^2-9}-\frac92\ln\left|x+\sqrt{x^2-9}\right|.

Value. 3(A+6ln⁡3)=243(A+6\ln3)=24.

Answer: 24