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4i/(1-i)³
=4i·(1+i)³/[(1+i)(1-i)]³
=4i·(1+3i+3i²+i³)/(1-i²)³
=4i·(1+3i-3-i)/[1-(-1)]³
=4i·(-2+2i)/2³
=8(-1-i)/8
=-1-i
选A
=4i·(1+i)³/[(1+i)(1-i)]³
=4i·(1+3i+3i²+i³)/(1-i²)³
=4i·(1+3i-3-i)/[1-(-1)]³
=4i·(-2+2i)/2³
=8(-1-i)/8
=-1-i
选A
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