September 2018 1 21 Report

Sprowadź do prostrzej postaci:

a)

(1-x⁻¹)⁻²-(1+x⁻¹)⁻²=

b)

(a³+b³)(a⁻¹-b)
(a⁻¹+b⁻¹)[(a-b)²+ab]


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