Arithmetic sequences

Structure of explicit formula

100

What does a₁ mean in the arithmetic formula?

First term of the sequence

200

What does d mean in the arithmetic formula?

The common difference of the sequence 

300

a_n mean in the arithmetic formula?

N^th  Term of the sequence

400

What is the arithmetic formula?

a_n=a₁+(n-1)d

500

How would you put this sequence into the arithmetic formula?

123, 178, 233

a_n=123+(n-1)(55)

Arithmetic sequence or not?

100

Is the sequence shown arithmetic?

128, 166, 204, 242

Yes it is adding by 38

200

Is the sequence shown arithmetic?

240, 480, 960, 1920

No it is being multiplied by 2

300

Is the sequence shown arithmetic?

238, 475, 712, 949

Yes it is being added by 237

Find the difference

100

What is the difference in the sequence shown below?

3857, 3867, 3877, 3887

d=10

200

What is the difference in the sequence shown?

3845, 4134, 4423, 4712

d=289

300

What is the difference of the sequence?

2894, 7215, 11,536, 15,857

d=4321

Find the term

100

What is the 5th term of the sequence shown?

21, 86, 151

a₅=216

200

What is the 6^th term of the sequence shown below?

345, 645, 945

a₆=1845

300

Using the sequence below what is the 7^th term?

536, 654, 772

a₇=1244