Which recursive formula describes the patterns in the perimeter of the images?
a. an=an-1+2; a1=1
b. an=an-1+1; a1=1
c. an=an-1+2; a1=4
d. an=2an-1+1; a1=4

Option C is correct.

Step-by-step explanation:

The arithmetic sequence says that:

For any sequence

the recursive formula for this sequence is given by:

where d represents the common difference of two consecutive terms and n is the number of terms.

Give the pattern in the figure:

for n = 1,  

for n = 2,  

for n = 3,  

or

Now, substitute d =2 in the above formula we get;

Therefore, recursive formula describes the patterns in the perimeter of the images is:

x = 12

y = 15

step-by-step explanation:

that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values