Question

if x1,x2,...xn are n non-zero real numbers such that :
(x1^2 + x2^2 + ... + xn-1^2) (x2^2 + x3^2 + ... + xn^2) >= (x1.x2 + x2.x3 + ... xn-1.xn)^2
then, x1,x2,...xn are in:
A) AP, B) GP, C)HP, D) None of these
(solve using Cauchy Schwartz inequality)

Answer 1

Answer:

1. LINEAR EQUATIONS. A linear equation in n unknowns x1, x2,ททท, xn ... (0, 2). Similarly, with x, y and z instead of x1, x2 and x3, the linear equation 2x

Step-by-step explanation: