求(1+i)3的模是多少啊?

2025-03-26 06:24:27
推荐回答(2个)
回答1:

|(1+i)3|
=|3+3i|
=√(3²+3²)
=3√2

回答2:

(1+i)³
=1³+3*1²*i+3*1*i²+i³
=1+3i-3-i
=-2+2i

∴|(1+i)³|
=|-2+2i|
=√[(-2)²+2²]
=2√2