當(dāng)實(shí)數(shù) 時(shí).復(fù)數(shù)為純虛數(shù).{-3} 查看更多

 

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已知復(fù)數(shù)z=m2(1+i)-m(3+i)-6i,則當(dāng)m為何實(shí)數(shù)時(shí),復(fù)數(shù)z是
(1)實(shí)數(shù);(2)虛數(shù);(3)純虛數(shù);(4)零;(5)對(duì)應(yīng)的點(diǎn)在第三象限.

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當(dāng)m分別為何實(shí)數(shù)時(shí),復(fù)數(shù)z=m2-1+(m2+3m+2)i是(1)實(shí)數(shù)?(2)虛數(shù)?(3)純虛數(shù)?(4)零?

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當(dāng)m為何實(shí)數(shù)時(shí),復(fù)數(shù)Z=(2m+1)(m-2)+(m-1)(m-2)i是
(1)實(shí)數(shù);(2)虛數(shù);(3)純虛數(shù);(4)對(duì)應(yīng)點(diǎn)在x軸上方.

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已知復(fù)數(shù)z=log2(m2-3m-3)+ilog2(m-3),當(dāng)m為何實(shí)數(shù)時(shí),復(fù)數(shù)z對(duì)應(yīng)點(diǎn)在直線x-2y+1=0上.

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當(dāng)m為何實(shí)數(shù)時(shí),復(fù)數(shù)z=
2m2-3m-2m2-25
+(m2+3m-10)i;
(1)是實(shí)數(shù);
(2)是虛數(shù);
(3)是純虛數(shù).

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