Teaching NVS TGT 2024 Test Series Engineering Mathematics Probability and Statistics Random Variables Basics

माना f(x)\( = \frac{K}{{1 + {x^2}}}\), -∞ < x < ∞ किसी यादृच्छिक चर का प्रायिकता घनत्व हो। तब k  किसके बराबर है?

1
π 
2
- π 
3
1 / π 
4
1
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