3*|a-b|-4*|a+c|+|b-c|,如果是這個(gè)式子
a>=|c|時(shí),得:4b-7a-5c
a<|c|時(shí) ,得a+4b+3c
三個(gè)數(shù)a、b、c的積為負(fù)數(shù),和為正數(shù),x=a的絕對(duì)值分之a(chǎn)加b的絕對(duì)值分之b加c的絕對(duì)值分之c,求x的值
三個(gè)數(shù)a、b、c的積為負(fù)數(shù),和為正數(shù),x=a的絕對(duì)值分之a(chǎn)加b的絕對(duì)值分之b加c的絕對(duì)值分之c,求x的值
數(shù)學(xué)人氣：574 ℃時(shí)間：2019-08-18 21:43:03
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