JEE Main 28 Jan 2025 Shift 1 Paper

Section: Mathematics

Question : 5 of 75

Marks: +1, -0

Let ‌nCr−1=28,‌nCr=56 and ‌nCr+1=70. Let A(4‌cos‌t, 4sin‌t),B(2sin‌t,−2‌cos‌t) and C(3r−n,r2−n−1) be the vertices of a triangle ABC, where t is a parameter. If (3x−1)2+(3y)2=α, is the locus of the centroid of triangles ABC, then α equals

[28 Jan 2025 Shift 1]

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