Let R be the region in the first quadrant enclosed by the graphs of f of x is equal to 8x to the third, and g of x is equal to sine of pi x, as shown in the figure above. And they drew the figure right over here. Part A, write the equation for the line tangent to the graph of f at x is equal to 1 half. So let me just redraw it here, just so that I like drawing on the black background, I guess is the main reason why I'm redrawing it. So the function f of x is equal to 8x to the third, looks like this. It looks like that. This is our f of x axis, and this is our x axis.