997÷997997/998+1/999过程

997÷997997/998+1/999过程
997÷997997/998+1/999过程

997÷997997/998+1/999过程
=997÷(997×1001)/998+1/999
=998/1001+1/999
=998003/999999

=7(√14-√7)/[(√14-√7)(√14+√7)]
=7(√14-√7)/(14-7)
=7(√14-√7)/7
=√14-√7
a=1/(2+√3)
=(2-√3)/(2-√3)(2+√3)
=(2-√3)/(4-3)
=2-√3
所以a和b互为相反数
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