b, ( mik cx ko viết đề bài lun ^_^ )
= ( 1 + 2 + 3 + ... + 100 ) . ( 12 + 22 + 32 + ... + 102 ) . ( 65 . 111 - 13 . 555 )
= ( 1 + 2 + 3 + ... + 100 ) . ( 12 + 22 + 32 + ... + 102 ) . ( 65 . 111 - 13 . 5 . 111 )
= ( 1 + 2 + 3 + ... + 100 ) . ( 12 + 22 + 32 + ... + 102 ) . ( 65 . 111 - 65 . 111 )
= ( 1 + 2 + 3 + ... + 100 ) . ( 12 + 22 + 32 + ... + 102 ) . 0
= 0
Chúc hok tốt !
Mk nhầm sr nhé :
A = \(\frac{2^{10}\left(13+65\right)}{2^8.2^3.13}\)
A = \(\frac{2^{10}.78}{2^{11}.13}\)
A = \(\frac{2^{10}.13.3.2}{2^{11}.13}\)
A = \(\frac{2^{11}.13.3}{2^{11}.13}\)
A = \(3\)
a, ( mik ko viết đề bài đặt A luôn nhé )
A = \(\frac{2^{10}\left(13+65\right)}{2^8.2^3.3}\)
A = \(\frac{2^{10}.78}{2^{11}.3}\)
A = \(\frac{2^{10}.2.3.13}{2^{11}.3}\)
A = \(\frac{2^{11}.3.13}{2^{11}.3}\)
A = \(13\)
a)
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}=\frac{2^{10}.\left(13+65\right)}{2^8.4.26}=\frac{2^{10}.78}{2^{10}.26}=\frac{2^{10}.26.3}{2^{10}.26}=3\)