若3A=4B,5B=6C,则A:B:C=():():()
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若3A=4B,5B=6C,则A:B:C=():():()若3A=4B,5B=6C,则A:B:C=():():()若3A=4B,5B=6C,则A:B:C=():():()4/3:1:5/6
若3A=4B,5B=6C,则A:B:C=():():()
若3A=4B,5B=6C,则A:B:C=():():()
若3A=4B,5B=6C,则A:B:C=():():()
4/3:1:5/6
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(1) 化简 (x-c)/(x-a)(x-b)+(b-c)/(a-b)(x-b)+(b-c)/(b-a)(x-a)(2) 化简(2a-b-c)/(a-b)(a-c)+(2b-c-a)/(b-c)(b-a)+(2c-a-b)/(c-b)(c-a)(3) 证明,若a+b+c=0,则1/(b方+c方-a方)+1/(c方+a方-b方)+1/(a方+b方-c方)=0
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若3A=4B,5B=6C,则A:B:C=():():()
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