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Question Number 166358 by leicianocosta last updated on 19/Feb/22

Answered by naka3546 last updated on 19/Feb/22

((3a^2 +5)/(a^2 −1)) − ((3a^2 +1)/(a^2 −1)) < 0 (4/(a^2 −1)) < 0 2( (1/(a−1)) − (1/(a+1)) ) < 0 −1 < a < 1

3a2+5a2−1−3a2+1a2−1<04a2−1<02(1a−1−1a+1)<0−1<a<1

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