来自吕颖的问题
1.已知f(x)={2x(x>0)-x(x≤0)则f(f(-3))=
1.已知f(x)={2x(x>0)-x(x≤0)则f(f(-3))=
1回答
2020-04-05 14:58
1.已知f(x)={2x(x>0)-x(x≤0)则f(f(-3))=
1.已知f(x)={2x(x>0)-x(x≤0)则f(f(-3))=
-30
所以f[f(-3)]
=f(3)
=2×3
=6