若xn-yn可以分解为(x+y)(x-y)(x2+xy+y2)(x2-xy+y2),那么n=( )A.2B.4C.6D.8
题型:单选题难度:简单来源:不详
若xn-yn可以分解为(x+y)(x-y)(x2+xy+y2)(x2-xy+y2),那么n=( ) |
答案
(x+y)(x-y)(x2+xy+y2)(x2-xy+y2) =(x3+y3)(x3-y3) =x6-y6. 所以n的值为6. 故选C. |
举一反三
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