Proof WritingChallengeDirect Proof ShareDirect Proof · Challenge problemFor positive reals x,y,zx, y, zx,y,z with xyz=1xyz = 1xyz=1, what is the smallest possible value of (1+x)(1+y)(1+z)(1 + x)(1 + y)(1 + z)(1+x)(1+y)(1+z)?Check Show answer Walk through it step by step Practice more like this Review this concept