求Y=1/ln(X+1)+根号下(4-x²)的值域

问题描述:

求Y=1/ln(X+1)+根号下(4-x²)的值域

郭敦顒回答:x≠0,0<x≤2,x→0时,1/ln(x+1) →+∞,√(4-x²)→2,y→+∞;x=2时,1/ln(x+1)=0.91024,√(4-x²)=0,y=1/ln(x+1)+√(4-x²)=0.91024,∴y=1/ln(x+1)+√(4-x²)的值域是:[0.9...