Question

49. If a + b + c = 9 (where a, b, c
are real numbers), then the min
imum value of a^2 + b^2 + c^2 is
(1) 100
(2) 9
(3) 27
(4) 81
​

Answer 1

2^3×3^3×2^4×3^5×3^6 = 27