PG entrance exam CUET PG 2025 Mock Test Mathematical Science Integral Calculus

The value of the integral ​ \(\int_0^{\infty} e^{-x^2} d x\) is:

1
\(\frac{\pi}{2}\)
2
\(\frac{3 \pi}{2}\)
3
\(\frac{\sqrt{\pi}}{2}\)
4
\(\frac{5 \sqrt{\pi}}{2}\)
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