Question

Pls answer me very fast pls

Answer 1

Answer:

$\frac{7}{30}$

Explanation:

$\frac{1}{1 \times 2 \times 3}+ \frac{1}{2 \times 3 \times 4}+ \frac{1}{3 \times 4 \times 5}+ \frac{1}{4 \times 5 \times 6}$

$= \frac{1}{6}+\frac{1}{24} + \frac{1}{60} + \frac{1}{120}$

$\frac{20 + 5 + 2 + 1}{120} = \frac{28}{120} = \frac{7}{30}$

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