第1点运算定义型(★★★★)必做1已知i是虚数单位,C是全体复数构成的集合,若映射f:C→R满足:对任意z1,z2∈C,以及任意λ∈R,都有f(λz1+(1-λ)z2)=λf(z1)+(1-λ)f(z2),则称映射f具有性质P.给出如下映射:1f1:C→R,f1(z)=x-y,z=x+yi(x,y∈R);2f2:C→R,f2(z)=x2-y,z=x+yi(x,y∈R); The first point of the definition of type (★ ★ ★ ★) must do 1 Known i is an imaginary unit, C is the set of all complex, if the mapping f: C → R satisfy: for any z1, z2∈C, and arbitrary λ (1-λ) z2) = λf (z1) + (1-λ) f (z2), the mapping f has the property P. The following mapping is given: 1f1: C → R, 2f2: C → R, f2 (z) = x2-y, z = x + yi (x, y∈R);