Rút gọn rồi tính a) 5 $\sqrt{(-2)^{4}}$ b) -4 $\sqrt{(-3)^{6}}$ c) $\sqrt{}$ $\sqrt{(-5)^{8}}$ 05/09/2021 Bởi Melody Rút gọn rồi tính a) 5 $\sqrt{(-2)^{4}}$ b) -4 $\sqrt{(-3)^{6}}$ c) $\sqrt{}$ $\sqrt{(-5)^{8}}$
a, 5$\sqrt[]{(-2)^4}$ = 5. 2² = 5.4 =20 b, -4$\sqrt[]{(-3)^6}$ = -4 . 3³ =-4. 27 =108 c, $\sqrt[]{\sqrt[]{(-5)^8}}$ = $\sqrt[]{5^4}$ = 5² =25 Bình luận
a) `5\sqrt((-2)^4)` `= 5 \sqrt((-1)^4. 2^4)` `= 5\sqrt(2^4)` `= 5. 2^2` `= 5.4` `=20` b) `-4 . \sqrt((-3)^6)` `= -4.\sqrt(3^6)` `= -4. 3^3` `= -4.27` `=-108` c) `\sqrt(\sqrt((-5)^8))` `= \sqrt(\sqrt((5^4)^2))` `= \sqrt((5^2)^2)` `= 5^2 ` `= 25` Bình luận
a, 5$\sqrt[]{(-2)^4}$
= 5. 2²
= 5.4
=20
b, -4$\sqrt[]{(-3)^6}$
= -4 . 3³
=-4. 27
=108
c, $\sqrt[]{\sqrt[]{(-5)^8}}$
= $\sqrt[]{5^4}$
= 5²
=25
a) `5\sqrt((-2)^4)`
`= 5 \sqrt((-1)^4. 2^4)`
`= 5\sqrt(2^4)`
`= 5. 2^2`
`= 5.4`
`=20`
b) `-4 . \sqrt((-3)^6)`
`= -4.\sqrt(3^6)`
`= -4. 3^3`
`= -4.27`
`=-108`
c) `\sqrt(\sqrt((-5)^8))`
`= \sqrt(\sqrt((5^4)^2))`
`= \sqrt((5^2)^2)`
`= 5^2 `
`= 25`