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Question Number 170050 by DAVONG last updated on 14/May/22
Show that,∀a,b,c∈R :a^2 +b^2 +c^2 +12≥4(a+b+c)
Showthat,∀a,b,c∈R:a2+b2+c2+12⩾4(a+b+c)
Answered by mindispower last updated on 15/May/22
12=4+4+4 4+x^2 ≥4x⇒ a^2 +4+b^2 +4+c^2 +4≥4a+4b+4c=4(a+b+c)
12=4+4+44+x2⩾4x⇒a2+4+b2+4+c2+4⩾4a+4b+4c=4(a+b+c)

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