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Find the area of the region bounded above by y=exy=e^xy=ex​, bounded below by y=xy=xy=x​, and bounded on the sides by x=0_0x=0 \_0x=0_0​ and x=1x
Question

Find the area of the region bounded above by y=exy=e^x​, bounded below by y=xy=x​, and bounded on the sides by x=0_0x=0 \_0​ and x=1x=1​.

A.

e32e-\frac{3}{2}​​

B.

e12e-\frac{1}{2}​​

C.

e34e-\frac{3}{4}​​

D.

e1e-1​​

Correct option is A

 Upper boundary: y=ex Lower boundary: y=x Left boundary: x=0 Right boundary: x=1Set Up the IntegralThe area A between the curves from x=0 to x=1 is given by the integral of the upper function minusthe lower function:A=01(exx)dxCompute the IntegralEvaluate the integral step by step:A=01exdx01xdxA=[ex]01[x22]01A=(e1e0)(122022)A=(e1)(120)A=e112A=e32\begin{aligned}&\bullet \ \text{Upper boundary: } y = e^x \\&\bullet \ \text{Lower boundary: } y = x \\&\bullet \ \text{Left boundary: } x = 0 \\&\bullet \ \text{Right boundary: } x = 1 \\\\&\textbf{Set Up the Integral} \\&\text{The area } A \text{ between the curves from } x = 0 \text{ to } x = 1 \text{ is given by the integral of the upper function minus} \\&\text{the lower function:} \\&\qquad A = \int_{0}^{1} (e^x - x) dx \\\\&\textbf{Compute the Integral} \\&\text{Evaluate the integral step by step:} \\&\qquad A = \int_{0}^{1} e^x dx - \int_{0}^{1} x dx \\&\qquad A = \left[ e^x \right]_{0}^{1} - \left[ \frac{x^2}{2} \right]_{0}^{1} \\&\qquad A = (e^1 - e^0) - \left( \frac{1^2}{2} - \frac{0^2}{2} \right) \\&\qquad A = (e - 1) - \left( \frac{1}{2} - 0 \right) \\&\qquad A = e - 1 - \frac{1}{2} \\&\qquad A = e - \frac{3}{2}\end{aligned}​​

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