当x>0时,f(x)=根号x+1当x小于0时,-x＞0,满足函数f(x)=根号x+1的,即f（-x）=根号（-x）+1又f（x）是奇函数,所以f（-x）=-f（x）即-f（x）=根号（-x）+1,f（x）=-根号（-x）-1 （x＜0）即f（x）=根号x+1 （x＞0）=-根...