delete now plz
Let a be the point of the tangent line then
is a point on the graph
So the slope at point a is
Now we can find the equation of the line through the point
We can now find the x and y intercepts of the equation of the line
and
These are the lengths of the base and height of the triangle
So its area is
setting each factor equal to zero and solving gives a=1 or a=-1
since we want the part in the first quadrant we don't use a=-1
Yeah!!!