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15Anastasia15
@15Anastasia15
July 2022
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Найдите значение выражения [tex] \frac{a ^{2}-81 }{2a ^{2}-18a } [/tex] при a=-0,1
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Lesben
(a²-81)/(2a²-18a)=(a+9)(a-9)/2a(a-9)=(a+9)/2 a
========
a≠0,a≠9
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Lesben
a=-0,1: (-0,1+9)/2.(-0,1)=8,9/(-0,2)=-89/2=-44,5
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========
a≠0,a≠9