If x,y,z∈(0,1) such that x+y+z=1, then the least value of (1−x)(1−y)(1−z)xyz is
A
8.0
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
B
8.00
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
C
8
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution
Using AM≥GM, x+y≥2√xy, y+z≥2√yz, z+x≥2√zx
Multiplying all three inequalities, we get (x+y)(y+z)(z+x)≥8xyz
Since x+y+z=1, ∴(1−z)(1−x)(1−y)≥8xyz ⇒(1−z)(1−x)(1−y)xyz≥8 ∴ Least value =8