JEE-Mains 2015 (8/30)

Algebra Level 4

If mm is the arithmetic mean of two distinct real numbers ll and nn (l,n>1)(l,n>1) and G1,G2G_1,G_2 and G3G_3 are three geometric means between ll and nn , then G14+2G24+G34G_1^4+2G_2^4+G_3^4 equals :

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