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Bottom001
@Bottom001
October 2021
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Решите неравенство,пожалуйста!
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Sasha493
1/(x-3)(x-4) + 1/(x-3)(x-5) + 1/x^2-9x+20 《1
Решение:
1) x^2-9x+20
D=(-9)^2-4*1*20=81-80=1
x (1)= 9-1/2=4
x (2)= 9+1/2=5
x^2-9x+20=(x-4)(x-5)
2) 1*(x-5)/(x-3)(x-4) + 1*(x-4)/(x-3)(x-5) + 1*(x-3)/(x-4)(x-5)《1
(x-5)+(x-4)+(x-3)《1
3x-12《1
3x《13
x《 4(целых) 1/3
2 votes
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Answers & Comments
Решение:
1) x^2-9x+20
D=(-9)^2-4*1*20=81-80=1
x (1)= 9-1/2=4
x (2)= 9+1/2=5
x^2-9x+20=(x-4)(x-5)
2) 1*(x-5)/(x-3)(x-4) + 1*(x-4)/(x-3)(x-5) + 1*(x-3)/(x-4)(x-5)《1
(x-5)+(x-4)+(x-3)《1
3x-12《1
3x《13
x《 4(целых) 1/3