a) 9 .3 ³ . $\frac{1}{81}$ . 3 ²
b) 4 . 2 ∧ 5 . ( 2 ³ . $\frac{1}{16}$
a) 9 .3 ³ . $\frac{1}{81}$ . 3 ² b) 4 . 2 ∧ 5 . ( 2 ³ . $\frac{1}{16}$
By Sarah
By Sarah
a) 9 .3 ³ . $\frac{1}{81}$ . 3 ²
b) 4 . 2 ∧ 5 . ( 2 ³ . $\frac{1}{16}$
Đáp án:
a)=$3^{3}$
b)=$2^{6}$
Giải thích các bước giải:
a)9.$3^{3}$ . $\frac{1}{81}$ .$3^{2}$
=$3^{2}$. $3^{3}$ . $3^{2}$ . $\frac{1}{81}$
=($3^{2}$ .$3^{3}$ . $3^{2}$) . $\frac{1}{81}$
=$3^{7}$ . $\frac{1}{81}$
=$3^{3}$
b)
4. $2^{5}$ . ($2^{3}$ . $\frac{1}{16}$ )
=$2^{2}$ .$2^{5}$ . $2^{3}$ . $\frac{1}{16}$
=($2^{2}$ .$2^{5}$ . $2^{3}$) . $\frac{1}{16}$
=$2^{10}$ . $\frac{1}{16}$
=$2^{6}$
Đáp án:
`a)=3^3`
`b)=2^6`
Giải thích các bước giải:
`a)`
`9 . 3^3 . 1/81 . 3^2`
`=3^2 . 3^3 . 1/81 .3^2`
`=(3^2 . 3^3 . 3^2).1/81`
`=3^(2+3+2) . 1/81`
`=3^7 . (1^4)/(3^4)`
`=3^7 . 1/(3^4`
`=3^7/3^4`
`=3^7 : 3^4`
`=3^(7-4)`
`=3^3`
`b)`
` 4 . 2 ^5 .(2^3 . 1/16)`
`=2^2 . 2^5 .(2^3 . 1/16)`
`=2^2 . 2^5 . 2^3 . 1/16`
`=(2^2 . 2^5 . 2^3) . 1/16`
`=2^(2+5+3) . 1/16`
`=2^10 . 1/16`
`=2^10/16`
`=2^10/2^4`
`=2^10 : 2^4`
`=2^(10-4)`
`=2^6`