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Katya2004877
@Katya2004877
July 2022
1
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Найдите три решения неравенства
89/90 < x < 1
3/7 < x < 4/7
1/5 < x < 1/4
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lara164
Verified answer
Умножим и числитель и знаменатель на 4 , получим
(89*4)/(90*4)<x<360/360
356/360<x<360/360
решения х=357/360, 358/360, 359/360
***********************
3/7<x<4/7
(3*4)/(7*4)<x<(4*4)/(7*4)
12/28<x<16/28
решения х= 13/28, 14/28, 15/28
**************
1/5<x<1/4 приведем к общ знаменателю 20
4/20<x<5/20
(4*4)/(20*4)<x<(5*4)/(20*4)
16/80<x<20/80
решения х=17/80, 18/80, 19/80
4 votes
Thanks 7
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Answers & Comments
Verified answer
Умножим и числитель и знаменатель на 4 , получим(89*4)/(90*4)<x<360/360
356/360<x<360/360
решения х=357/360, 358/360, 359/360
***********************
3/7<x<4/7
(3*4)/(7*4)<x<(4*4)/(7*4)
12/28<x<16/28
решения х= 13/28, 14/28, 15/28
**************
1/5<x<1/4 приведем к общ знаменателю 20
4/20<x<5/20
(4*4)/(20*4)<x<(5*4)/(20*4)
16/80<x<20/80
решения х=17/80, 18/80, 19/80