Question

（1）计算：(3?2)0+(13)?1?|?12|（2）化简：m2?2m+1m2?1÷(m?1?m?1m+1)

（1）计算：(3?2)0+(13)?1?|?12|（2）化简：m2?2m+1m2?1÷(m?1?m?1m+1)．

Answer 1

（1）解：原式=1+3-2

3

=4-2

3

；

（2）解：原式=

(m?1)2

(m+1)(m?1)

÷

(m?1)(m+1)?(m?1)

m+1

=

(m?1)2

(m+1)(m?1)

÷

m2?m

m+1

=

(m?1)2

(m+1)(m?1)

×

m+1

m(m?1)

=

1

m

．