设f(x，y)=ex2+y2，g(x，y)=lnx+lny，则g[f(x，y)，y2]=____.

设f(x，y)=e^x2+y2，g(x，y)=lnx+lny，则g[f(x，y)，y²]=____.
【正确答案】：x²+y²+2lny. 解析: g[f(x,y)，y²]=g[e^x2+y2 +y²]-lne^x2+y2+lny²= x²+y²+2lny．