engineering recuitment FSSAI Assistant Mock Test 2021 Mathematics Sequences and Series Special Series
\(\rm\frac {1}{1 \times 2}+\frac {1}{2 \times 3}+\frac {1}{3 \times 4}+\frac {1}{4 \times 5} +\ ...\ +\frac{1}{n\times(n+1)}\) = ?
1
\(\rm \frac {n - 1}{n}\)
2
\(\rm \frac {n}{n + 1}\)
3
\(\rm \frac {n + 1}{n}\)
4
\(\rm \frac {1}{n(n + 1)}\)