Wiskunde Multiple Choice Vraag

Wat is correct ?
A. $\int_{-\infty}^{+\infty}e^{-x^2}\,dx=\sqrt\pi$
B. $\int_{-\infty}^{+\infty}e^{-x^2}\,dx=2\sqrt\pi$
C. $\int_{-\infty}^{+\infty}e^{-x^2}\,dx=1$
D. $\int_{-\infty}^{+\infty}e^{-x^2}\,dx=\sqrt\frac{\pi}{2}$
E. $\int_{-\infty}^{+\infty}e^{-x^2}\,dx=\sqrt{2\pi}$

[ 6-8071 - op net sinds 5.3.16-(E)-20.7.2024 ]

Which equality is correct ?