- Pleatedbibadornsthebodice.Putonyourbib.Nowyouarereadytoeat.Thebabywasslobberingalloverherbib.Shetiedabibunderherson'schin.Thereweretwocottonredvest,fourbibandsocks.TheEzhounotbuyanotherone,"tiger-shapedbib",caninotherplacesliketodo?Thebodyisalsosu...
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- 问题详情:已知复数z=bi(b∈R),是纯虚数,i是虚数单位.(1)求复数z;(2)若复数(m+z)2所表示的点在第二象限,求实数m的取值范围.【回答】.解:(1)∵z=bi(b∈R),∴.又∵是纯虚数,∴,∴b=2,即z=2i. ----5分(2)∵z=2i,m∈R,...
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