初三升高一暑假作业数学两问(红笔圈起来的⭕) 答案看不懂
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第一题
解：∵1+w+w^2=0
又∵原式=w^1980(1+w+w^2)+w^1983(1+w+w^2)+……+w^2007(1+w+w^2)
所以，原式=0
第二题
25^8=(5^2)^8=5^16
∴原式=5^16-5^14
=(5^2-1)*5^14
=24*5^14
所以可以
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