Answer:
4
Step-by-step explanation:
AD=4+8=12=DE thus angle EAD= angle AED=90÷2=45
angle ACB=90-45=45 thus CB=AB=4
2 x 2 x 5 x 5 x 5
2^2 x 5^3
A
this is an arithmetic sequence whose n th term ( explicit formula) is
=
+ (n - 1 )d
where d is the common difference and
the first term
here d = 10 - 8 = 8 - 6 = 6 - 4 = 2 and
= 4, hence
= 4 + 2(n - 1 ) = 4 + 2n - 2 = 2n + 2 → A