The line which is parallel to x-axis and crosses the curve y = $$\sqrt x$$ at an angle 45$$^\circ$$ is

The area included between the parabolas y² = 4x and x² = 4y is

Select the correct statement from (a), (b), (c), (d). The function $$f(x) = x{e^{1 - x}}$$

The equation e^x + x $$-$$ 1 = 0 has, apart from x = 0