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vichkapetrenko
@vichkapetrenko
March 2022
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помогите решить задание
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rrckurs
1) умножим исходное выражение
на a: a*a+a*b+a*c=0 => a*b+a*c=-1 (1*)
на b: a*b+b*b+c*b=0 => a*b+c*b=-1(2*)
на c: a*c+b*c+c*c=0 => a*c+b*c=-1(3*)
2) сложим (1*) (2*) (3*)
2*(a*b+a*b+b*c)=-3 => a*b+a*b+b*c= -3/2= -1,5
1 votes
Thanks 0
vichkapetrenko
увы, тут нет ответа -1,5
rrckurs
тогда уточните условие. возможно не так перевела
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Answers & Comments
на a: a*a+a*b+a*c=0 => a*b+a*c=-1 (1*)
на b: a*b+b*b+c*b=0 => a*b+c*b=-1(2*)
на c: a*c+b*c+c*c=0 => a*c+b*c=-1(3*)
2) сложим (1*) (2*) (3*)
2*(a*b+a*b+b*c)=-3 => a*b+a*b+b*c= -3/2= -1,5