Ta có:y=f(x)=a*x+b

y=f(0)=a*0+b

=0+b=b

=>f(0)=b mà f(0)= -2 nên b=-2

Ta lại có:y=f(x)=a*x+b

y=f(3)=a*3+(-2)

=>a*1=a

=>f(3)=a mà f(3)=1 nên a =1

Vậy hệ số cần tìm là a=1, b=-2 và y=f(x)=1*x+(-2)

so sánh điểm khác trận bạch đằng 1288 của nhà trần với trận Bạch đằng 981 và 938? mình đạng cần gấp thanhs

1. There is a cat in the room./There is a mouse in the room.

2 There are some trees in the garden.

3 There is a train at 11.30.

There are 5 lessons everyday at school.

I study science once a week.

I often do judo at the weekend.

I do my homework in the evening.

I never play football .

1.There are some birds near the gorilla.

2 There is a piece of rock near the tree.

3 There are some shark in the aquarium.

4.There is a dolphin in the aquarium ,too.

yours

1.How does Nam go to the post office? -He goes to the post office by bike.

2. How do Nga and Lan go to school ? - They go to school by school bus.

3. How  does your father travel to Ha Noi?-He tralvels to Ha Noi by plane.

4. How do the children go to the zoo?- They go to the zoo by bus.

5.How do you and your friends go to the stadium ?- We go to the stadium on foot.

6.How does Mrs Lien go to the market ?-She goes to the market by motorbike.

raining nha

July

I do my math homework.