1.求f(x)=x2-2x+3 x>1
1.求f(x)=x2-2x+3 x>1
=-x2-2x-1 x0
=兀 x=0
=0 x
1.求f(x)=x2-2x+3 和-x2-2x-1 這 2個式子的X取值分別是x>1 和 x0 x=0 x
=-x2-2x-1 x0
=兀 x=0
=0 x
1.求f(x)=x2-2x+3 和-x2-2x-1 這 2個式子的X取值分別是x>1 和 x0 x=0 x
數(shù)學人氣:247 ℃時間:2020-06-17 16:45:55
優(yōu)質(zhì)解答
1 1)f(x)=x2-2x+3令:y1=f(x)=x2-2x+3y1=x2-2x+1+2=(x-1)2+2y1-2=(x-1)2x=[正負更號y1-2]+1又因:x>1 所以:x=[更號y1-2]+1 (y1不等于2)反函數(shù)即為:y=[更號x-2]+1 (x不等于2)2)f(x)=-x2-2x-1 令:y2=f(x)=-x2-2x-1...
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