If the 17th and 18th terms in the expansion of (2 + a)50 are equal, find the value of a.

If the 17th and 18th terms in the expansion of (2 + a)50 are equal, find the value of a.

If the 17th and 18th terms in the expansion of (2 + a)50 are equal, find the value of a.

If the 17th and 18th terms in the expansion of (2 + a)50 are equal, find the value of a.