(xb/xc)(b + c - a) . ( xc/ xa) (c + a - b) . (xa / xb)(a + b - c) = ?
Solution
Correct Answer: Option B
x(b - c)(b + c - a) . x(c - a)(c + a - b) . x(a - b)(a + b - c)
= x(b - c)(b + c) - a(b - c) . x(c - a)(c + a) - b(c - a) . x(a - b)(a + b) - c(a - b)
= x(b^2 - c^2 + c^2 - a^2 + a^2 - b^2) . x-a(b - c) - b(c - a) - c(a – b)
= (x0 . x0)
= (1 x 1)
= 1
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