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যদি ( z=x+i y, z_ 1 =x_ 1 +i y_ 1 , z_ 2 =x_ 2 +i y_ 2 ) তিনটি জটিল সংখ্যা হয়, তবে - i. ( operatorname Re (z) leq|z| ) ii. ( arg left(z_ 1 z_ 2 right) leq arg z_ 1 + arg z_ 2 ) ii | Suva Ai