The number of factors in the numerator is , and of these
are negative; therefore, by taking -1 out of each of these negative
factors, we may write the above expression
Ex. 2. Find the general term in the expansion of .
The th term
by removing like factors from the numerator and denominator.
424. The following example illustrates a useful application of the Binomial Theorem.
Ex. Find the cube root of 126 to 5 places of decimals.
= 5.01329, to five places of decimals.