New Home › Forums › Math Olympiad - IOQM › How can I find the sum
Is there any shortcut method to find this;
\(\frac{1}{3\times 7\times 11} +\frac{1}{7\times 11\times 15} +\frac{1}{11\times 15\times 19} \cdots\) up to 20 terms?
.
.