The coefficients
could be chosen to be the coefficients in the Maclaurin series of
.
We have




It follows that
,
,
, and
.
im not 100% sure if my answers are right but heres what i got:
b. 3 and 1/2
d. 2 and 1/3 (or 2 3/9)
Answer: its either A or C, but im p sure its C
A
Hope taht was what you were asking for