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yuliavinyukova
@yuliavinyukova
April 2022
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Помогите, пожалуйста. Очень срочно нужно. 7 задание, и неравенства.
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zeke000
1) x=4^1/2 => x=√4 => x=2;x=-2∉2) Замена log (x) на tt^2-5t+4=0решаем квадратное уравнение, получаем x1=4; x2=1подставляемlog(x)=4x=10 000log(x)=1x=103) logx<2 по основанию 9x<9^2 => x<81 => x∈[0;81)4) log(2x-5)>-2 по основанию 0.52x-5>0x>2.50.5^(-2)>2x-54>2x-5x<4.5x∉(2.5;4.5)
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zeke000
поправка - x∈(2.5;4.5)
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