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 – y1 = m(tangent)(x – x1)


therefore, the equation of the tangent is




Hence, proved


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