\(\frac{2^{10^2}13+2^{10}.65}{2^8.104}\)=?
tính : \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
Xét : 210 . 13 + 210. 65 = 210 . ( 13 + 65 ) = 210 . 78
28 . 104 = 28 . ( 22 . 26 ) = 28. 22. 26 = 210.26
có : \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)= \(\frac{2^{10}.78}{2^{10}.26}\)= \(\frac{78}{26}\)= 3
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}=\frac{2^{10}.\left(13+65\right)}{2^8.104}=\frac{2^{10}.78}{2^8.104}\)
\(=\frac{2^2.39}{52}=\frac{2^2.39}{2^2.13}\)
\(=\frac{39}{13}\)
\(=3\)
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)= ?
Tính giá trị biểu thức :
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(=\frac{2^{10}.\left(13+65\right)}{2^8.104}\)
\(=\frac{2^{10}.78}{2^8.104}\)
\(=\frac{2^8.2^2.78}{2^8.104}\)
\(=\frac{2^8.4.78}{2^8.104}\)
\(=\frac{2^8.312}{2^8.104}\)
\(=\frac{2^8.3.104}{2^8.104}=3\)
tính giá trị biêu thức:
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(=\frac{2^{10}.\left(13+65\right)}{2^8.104}\)
\(=\frac{2^{10}.78}{2^8.104}\)
\(=\frac{2^{10}.2.39}{2^8.2^3.13}\)
\(=\frac{2^{11}.39}{2^{11}.13}=3\)
Tính giạ trị biểu thức: \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(\frac{2^{10}\cdot13+2^{10}\cdot65}{2^8\cdot104}=\frac{2^{10}\cdot\left(13+65\right)}{2^8\cdot104}=\frac{2^{10}\cdot78}{2^8\cdot104}=\frac{2^{10}\cdot2\cdot3\cdot13}{2^8\cdot2^2\cdot13}=\frac{2^{11}\cdot3\cdot13}{2^{10}\cdot13}=2\cdot3=6\)
So Sánh: B = \(\frac{^{3^{10}.11+3^{10}.5}}{3^9.2^4}\) và C= \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
Ta có:
B=\(\frac{3^{10}.\left(11+5\right)}{3^9.2^4}\) = \(\frac{3^{10}.16}{3^9.2^4}\)= \(\frac{3^9.3.16}{3^9.16}\)= 3
C=\(\frac{2^{10}.\left(13+65\right)}{2^8.104}\) =\(\frac{2^{10}.78}{2^8.104}\) = \(\frac{2^8.2^2.78}{2^8.104}\)= \(\frac{4.78}{104}\) = \(\frac{4.78}{4.26}\)=\(\frac{78}{26}\)=3
=>B=C
Tính giá trị của các biểu thức:
a. \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
b. ( 1 + 2 + 3 + ... + 100 ) . ( 12 + 22 + 32 + ... + 102 ) . ( 65 . 111 - 13 . 15 . 37 )
A = \(\dfrac{2^{10}.13+2^{10}.65}{2^8.104}\)
A=\(\dfrac{2^{10}\left(13+65\right)}{2^8.104}\)
=\(\dfrac{2.78}{104}\)=\(\dfrac{78}{52}\)=\(\dfrac{39}{26}\)
210.13+210.65
28.104
210.13+210.65 = 210(13 + 65) = 210 . 78 = 1024 . 78 = 79872
28.104 = 2832
210.13+210.65= (13 + 65 ) . 210
= 78 . 210
= 78 . 1024
= 79872
28.104= 2112