các anh ơi cứu em nhanh : a) x – 1 = 2^10 : 2&8 b) 2/3 . (-1) + 2/3 . 1 – 0,5 c) 6/x = 10 d) 20^100 : x = 20^95 01/12/2021 Bởi Vivian các anh ơi cứu em nhanh : a) x – 1 = 2^10 : 2&8 b) 2/3 . (-1) + 2/3 . 1 – 0,5 c) 6/x = 10 d) 20^100 : x = 20^95
Đáp án: `a) x – 1 = 2^{10} : 2^8` `→ x – 1 = 2^2` `→ x – 1 = 4` `→ x = 4 + 1` `→ x = 5` Vậy `x = 5` `b) 2/3 . (-1) + 2/3 . 1 – 0,5` `= 2/3 . (-1 + 1) – 0,5` `= 2/3 . 0 – 0,5` `= 0 – 0,5` `= -0,5` `c) 6/x = 10` `→ 6 = x . 10` `→ x = 6 : 10` `→ x = 3/5` Vậy `x = 3/5` `d) 20^{100} : x = 20^{95}` `→ x = 20^{100} : 20^{95}` `→ x = 20^5` `→ x = 3200000` Vậy `x = 3200000` Bình luận
$a)$ $x – 1 = 2^{10} : 2^8$ $x – 1 = 2^2$ $x – 1 = 4$ $x = 4 + 1$ $x = 5$ $-$ Vậy $x = 5$ $b)$ $\dfrac{2}{3} . ( -1 ) + \dfrac{2}{3} . 1 – 0,5$ $= \dfrac{2}{3} . ( – 1 + 1 ) – 0,5$ $= \dfrac{2}{3} . 0 – 0,5$ $= 0 – 0,5$ $= – 0,5$ $c)$ $\dfrac{6}{x} = 10$ $6 : x = 10$ $x = 6 : 10$ $x = 0,6$ $-$ Vậy $x = 0,6$ $d)$ $20^{100} : x = 20^{95}$ $x = 20^{100} : 20^{95}$ $x = 20^{5}$ $-$ Vậy $x = 20^{5}$ ***Chúc bạn học tốt!*** Bình luận
Đáp án:
`a) x – 1 = 2^{10} : 2^8`
`→ x – 1 = 2^2`
`→ x – 1 = 4`
`→ x = 4 + 1`
`→ x = 5`
Vậy `x = 5`
`b) 2/3 . (-1) + 2/3 . 1 – 0,5`
`= 2/3 . (-1 + 1) – 0,5`
`= 2/3 . 0 – 0,5`
`= 0 – 0,5`
`= -0,5`
`c) 6/x = 10`
`→ 6 = x . 10`
`→ x = 6 : 10`
`→ x = 3/5`
Vậy `x = 3/5`
`d) 20^{100} : x = 20^{95}`
`→ x = 20^{100} : 20^{95}`
`→ x = 20^5`
`→ x = 3200000`
Vậy `x = 3200000`
$a)$
$x – 1 = 2^{10} : 2^8$
$x – 1 = 2^2$
$x – 1 = 4$
$x = 4 + 1$
$x = 5$
$-$ Vậy $x = 5$
$b)$
$\dfrac{2}{3} . ( -1 ) + \dfrac{2}{3} . 1 – 0,5$
$= \dfrac{2}{3} . ( – 1 + 1 ) – 0,5$
$= \dfrac{2}{3} . 0 – 0,5$
$= 0 – 0,5$
$= – 0,5$
$c)$
$\dfrac{6}{x} = 10$
$6 : x = 10$
$x = 6 : 10$
$x = 0,6$
$-$ Vậy $x = 0,6$
$d)$
$20^{100} : x = 20^{95}$
$x = 20^{100} : 20^{95}$
$x = 20^{5}$
$-$ Vậy $x = 20^{5}$
***Chúc bạn học tốt!***