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    Geometric Progressions Help

    I am having toruble with my geometric progressions, in that i ahv ebeen given a question where i am given the 7th and 26th terms of a GP. I am required to find the ratio however, which i could do if i had the first term. Usually i can do this as they only give me gps that are one term apart, and...
  2. O

    Question about Light

    IM not sure that this question should be here or in some other forum, anyway here is my question : When light travels from a more dense material to a less dense one (say from water to air) the light speeds up again. However i...
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