`@` `\text {Ans}`
`\downarrow`
`a,`
`4*8`
`= 2^2*2^3`
`=`\(2^{2+3}=2^5\)
`b,`
`4^5*4^4*4`
`=`\(4^{5+4+1}=4^{10}\)
`c,`
\(x^5\cdot x=x^{5+1}=x^6\)
`d,`
\(9\cdot27=3^2\cdot3^3=3^{2+3}=3^5\)
`e,`
\(243\div81=3^5\div3^4=3\)
`g,`
\(625\div25=5^4\div5^2=5^2\)
`@` `\text {Kaizuu lv uuu}`
a) \(4\cdot8=2^2\cdot2^3\)
\(=2^{2+3}=2^5=32\)
b) \(4^5\cdot4^4\cdot4\)
\(=4^{5+4+1}=4^{10}\)
c) \(x^5\cdot x\)
\(=x^{5+1}=x^6\)
d) \(9\cdot27=3^2\cdot3^3\)
\(=3^{2+3}=3^5\)
e) \(243:81=3^5:3^4\)
\(=3^{5-4}=3^1=3\)
g) \(625:25=5^4:5^2\)
\(=5^{4-2}=5^2=25\)
Lời giải:
a. $4.8=2^2.2^3=2^5$
b. $4^5.4^4.4=4^{5+4+1}=4^{10}$
c. 4x^5.x=x^{5+1}=x^6$
d. $9.27=3^2.3^3=3^{2+3}=3^5$
e. $243:81=3^5:3^4=3^{5-4}=3$
g.
$625:25=5^4:5^2=5^{4-2}=5^2$
