HSC · Higher Math 2nd Paper · Chapter 3: জটিল সংখ্যা · MCQ

যদি $\mathbf{z}=\mathrm{x}+\mathrm{i} ; \mathbf{z}_{1}=\mathrm{x}_{1}+\mathrm{i} \mathbf{y}_{1}$; $\mathbf{z}_{2}=\mathbf{x}_{2}+\mathbf{i y_ { 2 }}$ হলে,
i. $\operatorname{Re}(z) \leq|z|$
ii. $\arg \left(z_{1} z_{2}\right) \leq \arg \left(z_{1}\right)+\arg \left(z_{2}\right)$
iii. $\left|z_{1}-z_{2}\right| \geq\left|z_{1}\right|-\left|z_{2}\right|$নিচের কোনটি সঠিক ?