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OCR c1 question watch

    • Thread Starter

    The curve c has an equation y = f(x) where f(x) = (x+2)^2

    Find f(x)

    Can someone please tell me how to start this question

    Well it says "Find f(x)" ... technically you've found it.
    It's not very clear though... I think it wants you to find the values of x where y = 0...

    In which case all you need to do is look at your (x+2)(x+2) and you can see that x = -2.
    • Wiki Support Team

    Wiki Support Team
    (Original post by EvenStevens)
    I think it wants you to find the values of x where y = 0.
    Where did you get this from? If anything, I'd have thought the question was meant to read "find f'(x)", but it's certainly not clear.

    If that is the question, try expanding out the brackets before differentiating.

    I don't know, it confused me...so I just assumed it meant find x.

    If it was meant to read "find f'(x)", then yes, expand the (x+2)^{2} out, rejigger it a bit and just...differentiate! =D
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Updated: March 10, 2008
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