已知a,x1,x2,b成等差數(shù)列,a,y1,y2,b成等比數(shù)列,則x1+x2+y1×y2=?
已知a,x1,x2,b成等差數(shù)列,a,y1,y2,b成等比數(shù)列,則x1+x2+y1×y2=?
數(shù)學人氣：509 ℃時間：2020-03-23 05:23:37
優(yōu)質解答
x1+x2=a+by1×y2=a×bx1+x2+y1×y2=a+b+a×b
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