If $a,b,c > 0$, then prove that $[(1+a)(1+b)(1+c)]^7 > 7^7a^4b^4c^4$
I reached till : $8^7 > 7^7 \sqrt{abc}$
Can't move forward from there. Please help!
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7This was asked and answered a few days ago. – André Nicolas Jun 04 '16 at 06:55
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@ayush I think you have missed a power of 7 – low iq Jun 04 '16 at 08:00
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If you put large value of a, b,c ,you would see it – low iq Jun 04 '16 at 08:01