如果X=2又2013分之2012,求IxI+Ⅰx-1I+Ⅰx-2Ⅰ+Ⅰx-3I+Ix-4I+

2025-03-07 02:29:36
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回答1:

解:
x=2又2013分之2012,
所以,2IxI+Ⅰx-1I+Ⅰx-2Ⅰ+Ⅰx-3I+Ix-4I+Ix-5I
=x+(x-1)+(x-2)+(3-x)+(4-x)+(5-x)
=(x+x+x-x-x-x)+(-1-2+3+4+5)
=0+9
=0