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Popular Calculus >

tangent of f(x)=(8-9x)(8+9x),\at x=9

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Solution

tangent of f(x)=(8−9x)(8+9x),atx=9

Solution

y=−1458x+6625
Solution steps
Find the tangent point:(9,−6497)
Find the slope of f(x)=(8−9x)(8+9x):dxdf(x)​=−162x
EN:TitleGeneralEquationSlopeAtPoint2Eq:m=−1458
Find the line with slope m=−1458 and passing through (9,−6497):y=−1458x+6625
y=−1458x+6625

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Frequently Asked Questions (FAQ)

  • What is the tangent of f(x)=(8-9x)(8+9x),\at x=9 ?

    The tangent of f(x)=(8-9x)(8+9x),\at x=9 is y=-1458x+6625
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