Simplify each of the following expression.
1) 5i^7 + 4i^3 - i
2) √-2 + √-8
3) √-27 - √-12
F.4 Number system
2009-09-13 2:26 am
回答 (1)
2009-09-13 2:50 am
✔ 最佳答案
中四有複數?太神奇啦1 i^2=-1,i^4=1
5i^7+4i^3-i=5i^3+4i^3-i=9i^3-i=-9i-i=-10i
2 √-2 + √-8=√-1√2 + √-1√8=√2i+√8i=3√2i
3 √-27 - √-12=√27i - √12i=3√3i-2√3i=√3i
收錄日期: 2021-04-26 13:45:05
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