abs((1/2)(z1+z2)+sqrt(z1 z2))+abs((1/2)(...

`abs((1/2)(z_1+z_2)+sqrt(z_1 z_2))+abs((1/2)(z_1+z_2)-sqrt(z_1 z_2))=` Choose the correct answer. 1. `abs(z_1 + z_2)`, 2. `abs(z_1)+abs(z_2)`, 3. `abs(z_1 - z_2)`, 4. `abs(z_1)-abs(z_2)` .

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