Problem 70b

Step 1.

Let us consider given data and evaluate

 

 

 

Denote the coordinates of the point   by   In part (a) we calculated the intersections of the tangent line with the axis.

Area    regardless of The area of the triangle is half the product of the two the point   .

 

The area of the triangle is half the product of the two sides, since the axis form a right angle between them.