Question

计算：（1）a2?1a2+2a+1÷a2?aa+1?a2a+1；（2）(b2a)2÷(?ba)?(?3b4a)3

计算：（1）a2?1a2+2a+1÷a2?aa+1?a2a+1；（2）(b2a)2÷(?ba)?(?3b4a)3．

Answer 1

（1）原式=

(a+1)(a?1)

(a+1)2

×

a+1

a(a?1)

×

a2

a+1

，
=

a

a+1

．

（2）原式=

b2

4a2

×

a

?b

×(?

27b3

64a3

)=

27b4

256a4

．