The coefficient of the middle term in the binomial expansion in powers of\[x\]of\[{{(1+\alpha x)}^{4}}\] and of\[{{(1-ax)}^{6}}\]is the same, if a equals
A)\[-\frac{5}{3}\]
B) \[\frac{10}{3}\]
C) \[-\frac{3}{10}\]
D) \[\frac{3}{5}\]
Correct Answer:
C
Solution :
the coefficient ofin the middle term of expansion of The coefficient of x in the middle term of the expansion of According to question,