saroneshetu79 saroneshetu79
  • 26-05-2020
  • Mathematics
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The equation of a line tangent to f(x) at x-3 is given by Y=6x+8, what is the value of f'(x) ?

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ronhagrid310
ronhagrid310 ronhagrid310
  • 26-05-2020

Answer:

The equation of a line tangent to f(x) at = x - 3 is given by Y = 6x + 8

=> f'(x - 3) = 6x + 8

=> f(x - 3) = 3x^2 + 8x

=> f(x - 3) = 3(x^2 - 6x + 9) + 26(x - 3) + 51

=> f(x - 3) = 3(x - 3)^2 + 26(x - 3) + 51

=> f(x) = 3x^2 + 26x + 51

=> f'(x) = 6x + 26

Hope this helps!

:)

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