A=1^2+2^2+3^2+4^2+5^2+....+50^2

Tính nhanh A

Cái kéo cắt giấy là ứng dụng máy cơ đơn giản nào?

Chứng minh rằng : Nếu ab + cd + eg chia hết cho 11

Thì abcdeg chia hết cho 11

Ta có : 6^x+1.6 =36

=>6^x+1 = 36:6

=>6^x+1=6

=>6^x+1= 6¹

=>x+1=1

=>x=1-1

=>x=0

Tìm số dư khi chia

A = 2+2²+2³...........+2¹⁰⁰ cho 7

Complete each sentence so it means the same as the sentence above.

1. I don't have a bookshelf in my room.

-> There...........................

2.The note book is on the book.

->The book....................

3.The car is in front of the computer

->The bus .........

4. The cat is in front of the computer

-> The computer......

5 . She has blue eye

->Her eyes..............