Question

c) If xyz = 1, prove that 1+x+y' 1+ y + z y+z! d) If a+b+c= 0, prove that 1 1 + x + xb a) If x=2+23, prove that 2x³- 6x = 5. + 1 1+xb+xc + 1+z+x1 = 1. 1 1 + x + x =1 ​