I/ Write sentences based on the given cues.

1 Minh/ find/ football/ interesting/ because/ he/ bets friends.

2 My brother/ not like/ hunting/ because/ think/ dangerous.

3Why/ not/ you/ take/ jogging/ ? It/ help/ keep fit.

4 My son/ I/ love/ water/so/ we/ go/ surf/ together/ every Summer.

5 I/ think/ you/ take up/ joogging/ because/ it/ suitable/ health/ condition.

II/ Write a letter to respond your patien.

III/ Write a favourite hoobby.

A lớn nhất<=>a²⁰¹⁴+1 nhỏ nhất

a²⁰¹⁴ >= 0

=>a²⁰¹⁴+1 >= 1

=>A_Max=2013/1=2013

dấu "=" xảy ra<=>a=0