Arithmetic Sequences

Arithmetic Sequences

Arithmetic Series

Geometric Sequences

Geometric Series

Other Sequences

100

The common difference of the sequence -34, -64, -94, -124...

What is d = -30?

100

What is the sum of the first 35 terms of a sequence with explicit formula 5n-2?

What is 3080?

100

The common ratio of 4, 16, 36, 64... if the sequence is geometric?

What is not geometric?

100

The sum of the first 9 terms of the sequence 4*3^(n-1).

What is 39,364?

100

The next three terms of the sequence 0, 3, 8, 15, 24...

What is 35, 48, 63?

200

The 34th term of the sequence defined as an = -11 + 7n.

What is 227?

200

What is the sum of the first 45 terms of a sequence with explicit form 3n-9?

What is 2700?

200

The first five terms of the sequence with explicit formula a(n) = -4 * 3^(n-1).

What is -4, -12, -36, -108, -324?

200

The sum of the first 7 terms of 1 - 5 + 25 - 125...

What is 13,021?

200

The next three terms of the sequence 5, 5/2, 5/4, 5/8, 5/16...

What is 5/32, 5/64, 5/128?

300

The explicit formula (in linear form) of the sequence with first term of -38 and common difference of -100.

What is 62-100n?

300

The sum of the first 14 terms of a sequence with first term 42 and 14th term 146.

What is 1316?

300

The first five terms and explicit formula of a sequence with first term -3 and common ratio of -3.

What is -3, 9, -27, 81, -243 and a(n) = -3(-3)^(n-1)?

300

The number of terms if the first term is -3, r=4, and the sum of the terms is -4095.

What is 6?

300

The next three terms of the sequence -9, 101, -999, 10001, -99999,...

What is 1000001, -9999999, 100000001?

400

The explicit formula (in linear form) of the sequence with 249 as the 37th term and a constant difference of 8.

What is -47+8n?

400

The sum when n=15 of the series 20+30+40+...

What is 1350?

400

The 8th term of a geometric sequence with 4th term of -12 and 5th term of -6.

What is -0.75?

400

The sum of the infinite geometric series with first term 1 and ratio -4.

What is no sum?

400

The tenth term of the sequence 7, 9, 12, 16, 21...

What is 61?

500

The explicit form of the arithmetic sequence with 44.3 as the 18th term and 84.8 as the 33rd term.

What is 2.7n-4.3?

500

The value for n when S(n) = -1818 and the series is (-16)+(-26)+(-36)+...

What is 18?

500

The 8th term and first term of sequence with 5th term 768 and 2nd term of 12.

What is 49,152 and 3?

500

The infinite sum if the first term is -6 and the ratio is -0.5.

What is -4?

500

The formula for the sequence -6, -3, -2, -3/2, -6/5...

What is a(n) = -6/n?

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