Question

[nguyen phuong thao]

chung minh rang 8 mu 10 cong 2 mu 20 chia het cho 41

chung minh rang 313 mu 6 nhan 36 tru 313 mu 5 nhan 299 chia het cho 7

Answer 1

[Trung Phan Trọng]

8^8+2^20 
=(2^3)^8+2^20 
=2^(3.8)+2^20 
=2^24+2^20 
=2^20.2^4+2^20 
=2^20.(2^4+1) 
=2^20.17 chia hết cho 17  

k mk nha thanks bạn