函数y=lg [(x²+2x)/(x²+2x+3)]的定义域是?同时大于0时:x²+2x＞0 x²+2x+3＞0 解得(x>1或x0 或x

函数y=lg [(x²+2x)/(x²+2x+3)]的定义域是?同时大于0时:x²+2x＞0 x²+2x+3＞0 解得(x>1或x0 或x
函数y=lg [(x²+2x)/(x²+2x+3)]的定义域是?
同时大于0时:
x²+2x＞0 x²+2x+3＞0 解得(x>1或x0 或x

函数y=lg [(x²+2x)/(x²+2x+3)]的定义域是?同时大于0时:x²+2x＞0 x²+2x+3＞0 解得(x>1或x0 或x
你解错了
x^2+2x+3>0的解是x-1.
x^2+2x+3