tính giá trị cuả k để biểu thức có giá trị bằng số lớn nhất có 4 chữ số

2 câu trả lời

So lon nhat co 4 chu so la : 9999

⇒  k = 9999 + 50 = 10049

 

Đáp án:

7998

Giải thích các bước giải:

Ta có: m-n-p=a

Để a lớn nhất thì a+p phải nhỏ nhất và m là số lớn nhất

Suy ra n=1000; p=1001; m=9999

Ta có: 9999-1000-1001=a

Suy ra a=7998

Vậy giá trị lớn nhất là 7998

Câu hỏi trong lớp Xem thêm

This is John . He’s a teacher. He’s old and a little fat. He has short black hair. He works at the school. He teaches English. Every day he gets up at half past six in the morning. He takes a shower and puts on a shirt and tie. Then he eats breakfast at seven o’clock. At half past seven, he rides his motorcycle to school. Tony starts work at eight o’clock. He cleans the classroom. Then, he talks with his students’ parents. He starts teaching at nine o’clock. At twelve o’clock, he eats lunch. He teaches again in the afternoon. He goes home at half past four. In the evening, he feeds his goldfish and he watches TV. He eats dinner at half past six. Then he corrects students’ homework. At ten o’clock, he goes to bed. 1. What’s his name? …………………………………………………………………….. 2. What does he look like ? …………………………………………………………………….. 3. What time does he get up ? …………………………………………………………………….. 4. What time does he eat breakfast ? …………………………………………………………………….. 5. What time does he go home ? …………………………………………………………………….. 6. What time does he eat dinner? …………………………………………………………………….. 7. What time does he go to bed? …………………………………………………………………….. 8. What does he do in the evening ? ……………………………………………………………………..

2 lượt xem
1 đáp án
2 giờ trước