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最佳解答70%
解答1,335
問題664
  • Maths Equation?

    Is the solution to the equation (x^2 - 9) + (2x + 5) - 4 = 0 is also the solution to the equation |x^2 - 9| + |2x + 5| - 4 = 0?

    If not, why not? Please explain.

    2 個解答數學5 年前
  • Math. Induction?

    Prove by M. I. that

    1 - 1/2 + 1/3 - 1/4 + ......+ 1/(2n + 1) - 1/(2n + 2) = 1/(n + 2) + 1/(n + 3) + ..... + 1/(2n + 2)

    1 個解答數學5 年前
  • High Blood Pressure

    Hyzaar and Methyldopa are both used to treat high blood pressure, which one is better, safer and cheaper?

    1 個解答其他 - 健康9 年前
  • Health Question

    Is it true that 楊桃 is bad for the 腎臟 ? If yes, how bad?

    1 個解答其他 - 一般保健1 十年前
  • IPO Price of 3998

    Can someone tell me what was the IPO price of 3998? Thanks.

    2 個解答投資1 十年前
  • DVD Blank Disc

    Understand that there are DVD + R and DVD - R disc, what is the difference between the two? Under what condition we should choose + R or - R? Can some experts teach me? Thanks.

    1 個解答其他 - 硬體1 十年前
  • HDMI Connection Problem

    When I connect my notebook computer to a HDTV via a HDMI cable (the computer has a HDMI output terminal), there is picture but no sound! What is the problem? Do I need to change some setting of the computer to get the sound to the TV? Please help, thanks.

    1 個解答其他 - 硬體1 十年前
  • Router connection

    I bought a new notebook computer, unfortunately I forgot the router password , how can I connect the new computer to the router? Is it possible to get the password from the old notebook ? How? Please help.

    (The new notebook computer suggested to press the arrow button on the router for connection, I tried but not successful).

    2 個解答其他 - 互聯網1 十年前
  • 37\” LCD TV

    I decided to buy a 37" HD ( 1080) TV without built-in decoder. Japanese brand is preferred. What is the best suggestion? What will be the price? Please help.

    3 個解答其他 - 電器1 十年前
  • Window 7 vs Window Vista

    My main usages of notebook are playing games(not very sophisticated one, but could be in English, Chinese or Japanese), web search/browse and data processing (using Word and Excel).

    Now I would like to buy a notebook, please give me some advice on the following:

    1) Should it be Window 7 or Window Vista? Is Window 7 has obvious advantage over Window Vista for my usages?

    2) Is notebook with Window 7 more expensive? If yes, is it justified to pay more for the above usages?

    Please help, thanks.

    1 個解答軟體1 十年前
  • Vitamin Dosage

    The label on the bottle of multivitamin stated usage is one tablet per day, if I take one tablet only every 3 days, what will be the effect? Is it still effective?

    1 個解答其他 - 一般保健1 十年前
  • Blood Pressure

    What causes low blood pressure ( 95, 65)? Any methods to avoid? It happens mostly around 5 pm.

    2 個解答其他 - 疾病1 十年前
  • Road Sign

    Where can I get the complete list of road signs in Hong Kong? Is there any website showing this?

    1 個解答政府1 十年前
  • Router

    I would like to buy a router, please recommend the best choice under the following conditions:

    1. Home use for 1 desk top computers and 2 notebooks.

    2. Flat area 660 sq.ft.

    3. Budget : a) under $400, b) $400 - $600

    4. Wireless G or Wireless N is suggested ?

    5. Reliable and stable.

    Thanks.

    1 個解答其他 - 硬體1 十年前
  • Chorlesterol

    All kinds of nuts ( peanut, walnut, hazelnut etc ) are high in LD chorlesterol? Is this true?

    1 個解答其他 - 一般保健1 十年前
  • HD LCD TV

    Please recommend the best high definition TV available in the market under the following conditions:

    1) pixel 1080p

    2) LCD, not plasma.

    3) With built - in HD TV reception tuner.

    4) Japanese brand or Samsung.

    5) 37"

    6) Good reliability.

    1 個解答其他 - 電器1 十年前
  • Maths

    For a certain function f(x), f(a) + f(d) = f(c) + f(b) and a> b > c > d > 0.

    Also f"(x) < 0 and f'(x) > 0 for all x > 0.

    Prove that f[(a+d)/2] > f[(c +b)/2]. Please help.

    1 個解答數學1 十年前
  • Circle

    2 circles of diameter 1 cm and 2 cm are inscribed in a circle of diameter 3 cm. What is the diameter of the largest circle that can be put in the space between these 3 circles?

    3 個解答數學1 十年前