A clothing store is having a sale on T-shirts. The first T-shirt you buy costs \$7$7dollar sign, 7, and every additional shirt costs only \$5$5dollar sign, 5. Let f(n)f(n)f, left parenthesis, n, right parenthesis be the total cost of nnn shirts. fff is a sequence. What kind of sequence is it?

Is an arithmetic sequence (see the explanation)

Step-by-step explanation:

The correct question is

The first T-shirt you buy costs $7, and every additional shirt costs only $5. Let f(n) be the total cost of n shirts. F is a sequence. What kind of sequence is it?

Let

f(n) ----> the total cost

n ---> the number of shirts

we know that

For n=1

For n=2

For n=3

For n=4

so

In general

The sequence is

This is an arithmetic sequence, because it is a sequence of numbers in which the common difference between consecutive terms is 5

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

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step-by-step explanation: