Đáp án:
\(\dfrac{1}{2(x-5)}\sqrt{36(x-5)^2}-5=\dfrac{3|x-5|}{x-5}-5\)
Giải thích các bước giải:
\(\text{ĐKXĐ: x $\neq$ 5}\\ \dfrac{1}{2(x-5)}\sqrt{36(x-5)^2}-5\\ =\dfrac{1}{2(x-5)}\sqrt{6^2(x-5)^2}-5\\ =\dfrac{1}{2(x-5)}.6|x-5|-5\\ =\dfrac{6|x-5|}{2(x-5)}-5\\ =\dfrac{3|x-5|}{x-5}-5\)
chúc bạn học tốt!
Đáp án+Giải thích các bước giải:
`A=1/(2(x-5))*\sqrt{36(x-5)^2}-5(x ne 5)`
`=1/(2(x-5))*6|x-5|-5`
`=(3|x-5|)/(x-5)-5`
Với `x>5=>x-5>0`
`=>|x-5|=x-5`
`=>A=3-5=-2`
Với `x<5=>x-5<0`
`=>|x-5|=5-x`
`=>A=-3-5=-8`.
a) (Mn^2-1) . (m^2n+5) b) 4(x-1/2) . (x+1/2).(4x^2+1) c) (m^2-2m+4) . (m+2)-m^3+(m+3) . (m-3)-m^2-18 d) [(t+2) . (t^2+4)] . (t-2)
Viết văn tả người. ai cũng được.
tuổi hồng bằng 1/2 tuổi hoa,tuổi hoa bằng 1/4 tuổi bố tổng số tuổi của hông và bố là 36.hỏi mỗi người bao nhiêu tuổi
Cho tỉ lệ thức a/b=c/d CTR : a/a+b=c/c+d
Đề bài : Người ấy ( bạn , người thân , .... ) sống mãi trong lòng tôi
moi nguoi oi giup em a cau gian tiep dang cau hoi a 1'' are you going to the cinema ''he asked me 2 the teacher asked ''who speak english '' 3 ''how do you know that ?''she asked me
III Choose the corect answers
*Read the text and answer the following questions. The streets are crowded with traffic. Taxis are bringing tired people from the airport and the train stations to the hotels. They hope to sleep a few hours before their busy day in the big city. Trucks are bringing fresh fruits and vegetables into the city. Ships are bringing food and fuel to the harbour. By seven o’clock in the morning, the streets are filled again with people. Millions of people live in the big city, and millions of people who work in the big city live in the suburbs, the commuters, are hurrying to get to their offices. Everyone is in a hurry. Some stop only to drink a cup of coffee. Others stop to buy the morning paper or to have breakfast. The noise of traffic gets louder. The policemen blow their whistles to stop the traffic or to hurry it along. 1. Where do taxis often take people from? _______________________________________________________________________________ 2. What are trucks bringing into the city? _______________________________________________________________________________ 3. Are the streets filled again with people from 5am every day? _______________________________________________________________________________ 4. Who blow their whistles to stop the traffic? _______________________________________________________________________________ Giúp tui vs ạ khó quá
Cho 2,016 g kim loại M tác dụng vừa hết với oxi trong không khí, thu được 2,52 g oxit của nó. Hãy xác định oxit của kim loại đó.
Ch a/b=c/d. CMR a, a+b/a-b=c+d/c-d b, a+3b/b=c+3d/d
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