Lô nhìn dõ giúp mình

Question

Lô nhìn dõ giúp mình

Question

Lô nhìn dõ giúp mình
lo-nhin-do-giup-minh

in progress 0

Môn Toán RI SƠ 4 years 2020-11-21T08:12:43+00:00 2020-11-21T08:12:43+00:00 1 Answers 61 views 0

Answers ( )

Leave an answer

Name*

E-Mail*

Website

Featured image

Browse

Captcha* Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )

Answer*

About RI SƠ

Bo · Answer 1 · 2020-11-21T08:14:20+00:00

Đáp án:

Bài 1)
$1) x = \frac{- 3}{4} 2) [\begin{array}{r} x = \frac{1}{6} \\ x = \frac{2}{3} \end{array}$
Bài 2)
$1) \frac{1}{3} 2) 0, 000001 3) 1 4) 1 5) 4$

Giải thích các bước giải:

Bài 1)
$1) | x + \frac{3}{4} | = 0 \Leftrightarrow x + \frac{3}{4} = 0 \Leftrightarrow x = \frac{- 3}{4} 2) | \frac{5}{12} - x | + \frac{3}{8} = \frac{5}{4} \Leftrightarrow | \frac{5}{12} - x | = \frac{5}{4} - \frac{3}{8} \Leftrightarrow | \frac{5}{12} - x | = \frac{10}{8} - \frac{3}{8} \Leftrightarrow | \frac{5}{12} - x | = \frac{2}{8} = \frac{1}{4} \Leftrightarrow [\begin{array}{r} \frac{5}{12} - x = \frac{1}{4} \\ \frac{5}{12} - x = \frac{- 1}{4} \end{array} \Leftrightarrow [\begin{array}{r} x = \frac{5}{12} - \frac{1}{4} \\ x = \frac{5}{12} + \frac{1}{4} \end{array} \Leftrightarrow [\begin{array}{r} x = \frac{5}{12} - \frac{3}{12} \\ x = \frac{5}{12} + \frac{3}{12} \end{array} \Leftrightarrow [\begin{array}{r} x = \frac{2}{12} = \frac{1}{6} \\ x = \frac{8}{12} = \frac{2}{3} \end{array}$
Bài 2)
$1) {(\frac{- 1}{3})}^{2} : \frac{1}{3} = {(\frac{1}{3})}^{2} : \frac{1}{3} = \frac{1}{3} 2) [(0, 1)^{3}]^{2} = (0, 001)^{2} = 0, 000001 3) {[{(\frac{- 1}{27})}^{0}]}^{3} = 1^{3} = 1 4) {(\frac{1}{7})}^{7} {.7}^{7} = \frac{1^{7}}{7^{7}} {.7}^{7} = 1 5) (0, 25)^{4} .1024 = \frac{1}{256} .1024 = 4$

Login

Register Now