If $a, b, c$ are positive numbers, then prove that $(1+a)^7(1+b)^7(1+c)^7>7^7 a^4 b^4 c^4$ - Math Practice Question | divineJEE

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If $a, b, c$ are positive numbers, then prove that $(1+a)^7(1+b)^7(1+c)^7>7^7 a^4 b^4 c^4$

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