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দৃশ্যকল্প-১: ( z_ 1 =a-i b x ) যেখানে ( a=b=1 ) ( z_ 2 =p+i q ) যেখানে ( p, q in mathbb R ) দৃশ্যকল্প-২: ( f(x)=a x^ 2 +b+c x ) | Suva Ai