b1: giải pt : x+5/x-1 = x+1/x-3 - 8/x^2-4x+3

2n+1/2n+3 thuộc N chứng minh phân số này tối gian mình vote 5 sao cho

Tìm các số x,y biết x-y/3=x+y/13=xy/200 các bn giúp mk nha rồi mk sẽ vote 5* cho

Giúp mình nhé Rocky mountain spotted fever an acute febrile illness is transmitted to man by ticks. prevention is attained primarily by avoidance of tick-infested areas. when this impractical, personal prophylactic measures include the wearing of clothing which interferes with attchment of ticks, i.e., boots and a one-picece outer garment, preferably impregnated with a tick repellent, and daily inspection of the entire body, including the hairy parts, to detect and remove attached ticks In removing attached ticks, great care should be taken to avoid crushing the arthropod, with resultant contamination of the bite wound. Touching the tick with gasoline or whisky encourages detachment, but gentle fraction with tweezers applied close to the mouth parts may be necessary. The skin area should be disinfected with soap and water or other antiseptics. Similarly, precautions minor abrasions on the hands is possible. Vaccines are available commercially and should be used for those exposed to great risk, viz., persons frequenting highly endemic areas and laboratory workers exposed to the agent. Since the broad-spectrum antibiotics were shown to be such excellent therapeutic agents in Spotted Fever, there has been less impetus for vaccination of persons who run only a minor risk of infection. 1. What is the main purpose of the passage? A. Do describe the symptoms of Spotted Fever. B. To explain how to treat Spotted Fever C. To warn of the danger of Spotted Fever D. To outline the types of Spotted Fever 2. The author suggests all of the following as preventative measures against Spotted Fever EXCEPT A. removing hair from body B. staying away from infested areas C. dressing in suitable clothes D. using appropriate sprays 3. According to the passage, if whisky is applied to a tick, it A. attaches itself to the mouth B. becomes very confused C. bites the person D. falls off the body 4. The word “fraction” could be replaced by A. dissection B. examination C. investigation D. removal

V/. Write the second sentence so that it has a similar meaning to the first. 36/. I’m very pleased that we shall meet again soon. → I’m looking ____________________________________________________________ 37/. “Please bring your swimming things”, he told to me. → He told _______________________________________________________________ 38/. We started living the countryside fifteen years ago. → We have ______________________________________________________________ 39/. Lan likes visiting her grandparents every week. → Lan likes ______________________________________________________________ 40/. It’s three years since I last spoke to her. → I haven’t _____________________________________________________________

Giúp mik phần B nha, cảm ơn mn.

giải giúp mình câu 3 và câu 4 nha

2km^5hm^25m^=.......m^ tinh dien tich ban kinh r=6 cm là một bộ quân ao sau khi ha gia 10 phan tram co gia 270000 đồng vậy giá bộ quần ao luc đầu la .................... đồng

Cho tam giác ABC vuông tại A ( AB < AC ), phân giác AD. Từ D vẽ một đường thẳng vuông góc với BC cắt AC tại E. Tính góc EBD

Vitamin là gì ? Vitamin có vai trò gì đối với hoạt động sinh lý của cơ thể Giải giúp e vs ạ