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PkzPrist
@PkzPrist
July 2022
2
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Даю 100 баллов!
Найти функцию, обратную данной:
а)y=1/6x-12
б)y=4/8-x
в)y=-2x*2+7
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nKrynka
0 votes
Thanks 1
PkzPrist
Чет не то маленько, мы y через x выражали, и наоборот. а потом еще область определения находили, можешь обьяснить?
NNNLLL54
Verified answer
Решение
а)y=1/(6x) - 12
6xy + 72x = 1
x*(6y + 72) = 1
x = 1 / (6y + 72)
б) y= 4/(8-x)
(8 - x)*y = 4
8y - xy = 4
xy = 8y - 4
x = (8y - 4)/y
в) y=-2x*2+7
2x
² = 7 - y
x² = (7 - y)/2
x = - √[(7 - y)/2]
x = √[(
7 - y)/2]
1 votes
Thanks 1
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Answers & Comments
Verified answer
Решениеа)y=1/(6x) - 12
6xy + 72x = 1
x*(6y + 72) = 1
x = 1 / (6y + 72)
б) y= 4/(8-x)
(8 - x)*y = 4
8y - xy = 4
xy = 8y - 4
x = (8y - 4)/y
в) y=-2x*2+7
2x² = 7 - y
x² = (7 - y)/2
x = - √[(7 - y)/2]
x = √[(7 - y)/2]