Question

Очень срочно нужно,плииииз

Answer 1

1. (2a+1)/(a²-2a)+(2a-1)/(a²+2a)=(2a+1)/(a*(a-2))+(2a-1)/(a*(a+2))=
=((2a+1)*(a+2)+(2a-1)*(a-2))/(a*(a²-4))=(2a²+5a+2+2a²-5a+2)/(a*(a²-4))=
=(4a²+4)/(a*(a²-4))=4*(a²+1)/(a*(a²-4)).
2. 4*(a²+1)*(a²-4)/(a*(a²-4)*(a²+1))=4/a
3. 4/3⁻¹=4*3=12.