Common Difference
Explicit and Recursive
Find the nth term
Sum of the Arithmetic series
100
Find the common difference 17,12,7
-5
100

Find the Recursive formula of the arithmetic sequence 12, 21, 30, ...

A1= 12, An=An-1 + 9

100
Find the 38th term of the arithmetic sequence -29,-2,25...
970
100

Find the indicated sum for the first 8 term of the arithmetic series 8 + 12 + 16 + 20 + ... + 48

280

200
Find the common difference -129,-98,-67
31
200

Find the explicit formula for 12, 21, 30, ...

An = 9n + 3 

200
Find the 68th term of the arithmetic sequence 25,17,9....
-511
200

Find the number of terms in the series 4 + 9 + 14 + ... + 79

16 terms
300
Find the common difference 244,187,130
-57
300

Find the recursive formula of the arithmetic sequence 29, -1, -31, ...

A1= 29, An=An-1 - 30

300
Find the 27th term of the arithmetic sequence 5,8,11,14...
83
300

Find the sum of the first 10 terms of an arithmetic series with a first term of 2 and a common difference of 3. 

S10 = 155

400
Find the common difference 7,11,15
4
400

Find the recursive formula -42, -39, -36, ...

A1 = -42, An= An-1 + 3

400
Find the 16th term of the arithmetic sequence 17,12,7...
-58
400
Find the 19th partial sum of -19+23+65+....
6821
500
Find the common difference -10,-5,0
5
500
Find explicit formula -16.3,-18.4,-20.5....
an=-16.3+(n-1)-2.1
500
Find the 14th term of the arithmetic sequence 244,187,130..
-497
500

Find the indicated sum of the arithmetic series -10 - 6 - 2 + ... + 22

156

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