Prove that , where , , and are the sides of such that…

MATHEMATICS · Subjective · A Level · Mathematics · Algebra and Functions · Algebra and Functions

Problem

Prove that a2+b2+c2+2abc<2a^2+b^2+c^2+2abc<2, where aa, bb, and cc are the sides of △ABC\triangle ABC such that a+b+c=2a+b+c=2.

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