Answer is D) take 5 blocks away from the left side.
There are 8 blocks on the left and only 3 on the right, 8 - 3 = 5
Answer:
r is the common ratio (in geometric sequence)
d is the common difference (in arithmetic sequence)
n is the term number
a1 is the value of the first term
an is the value of the nth term
Step-by-step explanation:
arithmetic sequence formula:
an=a1+d(n-1)
geometric sequence formula:
an=a1•(r)^(n-1)
The expression given is
The sum of the expression will be,
The sum will be
