若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?

若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?
若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?
若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?

若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?若函数f(x)=kx+(k-1)x+2是偶函数,则f(x)的递减区间是?
二次函数函数f(x)=kx^2+(k-1)x+2是偶函数 则对称轴x=-(k-1)/2k=0 解得k=1 f(x)=x+2 f(x)的递减区间是(-∞,0]