- 問題詳情:已知複數z=bi(b∈R),是純虛數,i是虛數單位.(1)求複數z;(2)若複數(m+z)2所表示的點在第二象限,求實數m的取值範圍.【回答】.解:(1)∵z=bi(b∈R),∴.又∵是純虛數,∴,∴b=2,即z=2i. ----5分(2)∵z=2i,m∈R,...
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- Pleatedbibadornsthebodice.Putonyourbib.Nowyouarereadytoeat.Thebabywasslobberingalloverherbib.Shetiedabibunderherson'schin.Thereweretwocottonredvest,fourbibandsocks.TheEzhounotbuyanotherone,"tiger-shapedbib",caninotherplacesliketodo?Thebodyisalsosu...
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