问题 解答题

已知x3n=2,求x6n+x4n-x5n的值.

答案

∵x3n=2,

∴x6n+x4n•x5n

=(x3n2+x9n

=(x3n2+(x3n3

=4+8

=12.

单项选择题 A3/A4型题
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