# Question: ket u u1un and v v1vn be two...

###### Question details

Ket u = (u_{1},...,u_{n}) and v =
(v_{1},...,v_{n}) be two solutions to a system of
linear equations, and let k, l be two real numbers such that k + l
= 1.

Prove that the linear combination ku + lv is also a solution to the system.