Q. 183.5( 4 Votes )

# Prove that touches the straight line for all at the point (a, b).

Answer :

finding the slope of the tangent by differentiating the curve

m(tangent) at (a,b) is

equation of tangent is given by y – y_{1} = m(tangent)(x – x_{1})

therefore, the equation of the tangent is

Hence, proved

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Find the equation of tangent to the curve , at the point, where it cuts the x-axis.

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