Question 8
Find $a$, given
$$\frac14\times\frac26\times\frac38\times\frac4{10}\times\frac5{12}\times\cdots\times\frac{14}{30}\times\frac{15}{32}=\frac1{2^a}.$$
$$\frac14\times\frac26\times\frac38\times\frac4{10}\times\frac5{12}\times\cdots\times\frac{14}{30}\times\frac{15}{32}=\frac1{2^a}.$$