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    I don't know what to do with these two questions (I can do 4a)

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    Could we have the question?


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    Forget that, it's just loaded


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    (Original post by Isis_on_the_cake)
    Forget that, it's just loaded


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    Aha yeah, it's been a bit slow recently!
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    4(b) So once you know k you can work out the terms ... what is the common difference? Once you know that then you can continue the sequence ...


    5 How many times does a line that is a tangent cut a curve?
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    (Original post by Muttley79)
    4(b) So once you know k you can work out the terms ... what is the common difference? Once you know that then you can continue the sequence ...


    5 How many times does a line that is a tangent cut a curve?

    I got the right answer for the sequence question but I don't understand what they did here to get the answer:


    And a tangent cuts a curve once!
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    (Original post by creativebuzz)
    I got the right answer for the sequence question but I don't understand what they did here to get the answer:


    And a tangent cuts a curve once!
    24 is the largest multiple of 8 that is smaller than 25. Hence, the smallest positive term is 25 - 24 = 1.
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    (Original post by morgan8002)
    24 is the largest multiple of 8 that is smaller than 25. Hence, the smallest positive term is 25 - 24 = 1.
    Oh okay, thanks
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    So how do you find where the line cuts the curve? Then you know the equation has one solution i.e. two equal roots so the discriminant must be ....
 
 
 
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