Question

for what value of k
K X + Y + Z = 1 , X + K Y + Z =1,
X + Y + K = 1
(1) unique solution
(2) more than one solution
(3) no solution

Answer 1

more than 1 solution

Answer 2

CASE 1.
K SHOULD NOT BE BE EQUAL TO 1

CASE 2.
K IS EQUAL TO 1

CASE 3.
K SHOULD NOT BE EQUAL TO ZERO