(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
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![(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)](/uploads/image/z/11514751-7-1.jpg?t=%EF%BC%881%2B2i%EF%BC%89%2F%281-i%29%5E2+%E5%8C%96%E7%AE%80%EF%BC%881%2B2i%EF%BC%89%2F%281-i%29%5E2%3D+%281%2B2i%29%2F%281-2i-1%29%3D+%281%2B2i%29%2F%28-2i%29%3D+%28-1%2F2%29%281%2B2i%29%2Fi%3D+%28-1%2F2%29%28-i%2B2%29%3D+-1%2B%281%2F2%29i%281%2B2i%29%2F%281-2i-1%29%E4%B8%BA%E4%BB%80%E4%B9%88%E6%98%AF%281-2i-1%29%E8%80%8C%E4%B8%8D%E6%98%AF%281-2i%2Bi%5E2%29)
(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
(1+2i)/(1-i)^2 化简
(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i
(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
因为i²=-1
所以1-2i+i^2就是1-2i-1
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(1+2i)/(1-i)^2 化简(1+2i)/(1-i)^2= (1+2i)/(1-2i-1)= (1+2i)/(-2i)= (-1/2)(1+2i)/i= (-1/2)(-i+2)= -1+(1/2)i(1+2i)/(1-2i-1)为什么是(1-2i-1)而不是(1-2i+i^2)
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