\(\frac{1}{3 \times 7}+\frac{1}{7 \times 11}+\frac{1}{11 \times 15} \ldots \ldots . .+\frac{1}{899 \times 903}\) యొక్క విలువ ఎంత?
1
\(\frac{21}{509}\)
2
\(\frac{18}{403}\)
3
\(\frac{25}{301}\)
4
\(\frac{29}{31}\)
\(\frac{1}{3 \times 7}+\frac{1}{7 \times 11}+\frac{1}{11 \times 15} \ldots \ldots . .+\frac{1}{899 \times 903}\) యొక్క విలువ ఎంత?