Q. Find the area of the region bounded by the curves y=x, y=x2, and the lines x=0 and x=1
Find Intersection Points: First, we need to find the points of intersection between the curves y=x and y=x2 within the interval [0,1].To do this, we set the two equations equal to each other: x=x2.Squaring both sides gives us x=x4.This simplifies to x4−x=0, which factors to x(x3−1)=0.The solutions to this equation are x=0 and x=1, since x3−1=0 when x=1.
Determine Upper Curve: Next, we need to determine which curve is above the other between x=0 and x=1. For 0 < x < 1, we know that \sqrt{x} > x^2 because the square root function grows faster than the square function in this interval. Therefore, y=x is the upper curve and y=x2 is the lower curve.
Set Up Integral: Now we can set up the integral to find the area between the two curves from x=0 to x=1. The area A is given by the integral from 0 to 1 of (upper curve - lower curve) dx. So, A=∫01(x−x2)dx.
Calculate Antiderivatives: We calculate the integral separately for each function.First, for x, the antiderivative is (32)x(23).Second, for x2, the antiderivative is (31)x3.So, the integral becomes A=[32x23−31x3] from 0 to 1.
Evaluate Integral: We evaluate the antiderivatives at the upper and lower limits of the integral.At x=1, we have (32)(1)23−(31)(1)3=(32)−(31)=31.At x=0, both terms are zero because any nonzero number raised to a positive power and then multiplied by zero is zero.So, the area A is (31)−0=31.