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Find the equation of the tangent and the normal at the given point for:

  1. f(x)=x^2, (2,4)

  2. at x=2

    • f(x)=2^2=4 gradient is =4
  3. y=mx+c

  4. y=4x+c (2,4)

  5. 4=4*2+c c=-4

  6. y=4x-4

but I don't know how to do normal?....thx

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    thx for that! appreciate it! ;)2011-08-25

1 Answers 1

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Hint: The slope of the tangent times the slope of the normal is $-1$. You have a slope and a point on the tangent.

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    aww..i see now..thx for that!2011-08-25