f(x)是偶函数,g(x)是奇函数
f(x)+g(x)=1/(x-1)…①
所以有;
f(x)=f(-x)
g(x)=-g(-x)
令(1)中x=-x,
则有:
f(-x)+g(-x)=-1/(x+1)
f(x)-g(x)=-1/(x+1)…②
由①②把f(x),g(x)当作两个未知数整体求解
①+②得:
2f(x)=1/(x-1)-1/(x+1)=2/(x^2-1)
f(x)=1/(x^2-1)
另外也可求出g(x)=x/(x^2-1)
f(x)是偶函数,g(x)是奇函数
f(x)+g(x)=1/(x-1)…①
所以有;
f(x)=f(-x)
g(x)=-g(-x)
令(1)中x=-x,
则有:
f(-x)+g(-x)=-1/(x+1)
f(x)-g(x)=-1/(x+1)…②
由①②把f(x),g(x)当作两个未知数整体求解
①+②得:
2f(x)=1/(x-1)-1/(x+1)=2/(x^2-1)
f(x)=1/(x^2-1)
另外也可求出g(x)=x/(x^2-1)