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samephone18

  • 4 years ago

Write an equation for the line tangent to the circle x2 + y2 = 17, at the point (4, 1). Enter your answer in point-slope form: y - y1 = m(x - x1); example: y+3=-5(x-2)

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  1. amistre64
    • 4 years ago
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    y - 1 = f'(4)(x-4)

  2. Annand
    • 4 years ago
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    y1=1 x1=4 m=dy/dx at (4,1)

  3. amistre64
    • 4 years ago
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    f'(x) creates 2 points of tangency to a circle

  4. amistre64
    • 4 years ago
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    Dx{x^2 + y^2 = 17} = 2x + 2y.y' = 0 y' = -x/y ; at (4,1) .... ok, I forgot to read that single point part lol. y-1 = -4(x-4)

  5. whitekitten_cat
    • 4 years ago
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    i just did this prob!!

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