October 2018 1 13 Report

Uzasadnij, że poniższa nierówność jest prawdziwa.

a) (x^2+1)^2 - 2(x^2+1)(x^2-1) + (x^2-1)^2 = 4

b) (x+1)^3 - (x-1)^3 -6(x+1)(x-1) = 8


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