若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x
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若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x若a满足x+lgx=4,b满足x+10^x=4,
若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x
若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x<=0时f(x)=x^2+(a+b)x+2,求f(x)=x的解的个数
若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x
三个
x=-2, x=-1, x=2
3个
lgx=4-x,10^x=4-x,由数形结合知a+b=4,剩下解方程就可以,x^2+4x+2=x,解得x=-1,x=-2
还有一个解x=2,共3个解
若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x
若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x
若a满足x+lgx=4,b满足x+10^x=4,当x>0时f(x)=2,当x
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