Đại 6.Tính chia hết.

K

kachia_17

[tex]\huge P=\frac{a^2+a+4}{a-2}=\frac{(a^2-4)+(a-2)+10}{a-2}=\frac{(a-2)(a+2)+(a-2)+10}{a-2}=a+2+1+\frac{10}{a-2} \\ \ \\ P\in Z \Leftrightarrow a-2=\mp 1;\mp 2; \mp 5 ; \mp 10 \\ \ \\ ...[/tex]
 
You must log in or register to reply here.
Top Bottom