Answer:
c
Explanation:
we are given that
we are already given our first term i.e 45
for second term
simplify substraction:
since we have
substitute:
simplify multiplication:
for third term
simplify Substraction:
as
substitute:
simplify multiplication:
for forth term
simplify Substraction:
substitute:
simplify multiplication:
hence,
the first four terms are 45,-135,405,-1215