The formula is a_n = a_1 + (n - 1)d, where a_n is the nth term, a_1 is the first term, n is the term number, and d is the common difference.
The formula is a_n = a_1 + n - d.
The formula is a_n = a_1 * d + n.
The formula is a_n = (n - 1) a_1 + nd.
Add the first term to the second term.
Subtract the first term from the second term: d = a_2 - a_1.
Divide the first term by the second term.
Multiply the first term by the second term.
The sum is given by S_n = n/2 * (2a_1 + (n - 1)d).
The sum is given by S_n = a_n * n - d.
The sum is given by S_n = n(a_1 + d).
The sum is given by S_n = (2a_1 + nd)/2.
The sequence has reached its maximum.
It indicates that the sequence is decreasing.
The sequence becomes a geometric progression.
The sequence is undefined.
No, the common difference must be positive.
Yes, if all terms are prime numbers.
Yes, if the common difference is zero.
No, the terms must always differ.
A binary arithmetic sequence.
A single-term arithmetic sequence.
A 2-term arithmetic sequence.
A minimal sequence.
Arithmetic progression adds a constant (common difference), while geometric progression multiplies by a constant (common ratio).
Arithmetic progression divides a constant, while geometric adds a constant.
Arithmetic progression has varying differences, geometric has varying ratios.
Arithmetic multiplies a constant, geometric divides a constant.
The sequence remains arithmetic with a scaled common difference.
The sequence becomes non-arithmetic.
The sequence remains constant.
The sequence turns into a geometric progression.
The midpoint is the average of the first and last terms.
The midpoint is the first term plus the last term.
The midpoint is the product of the middle two terms.
The midpoint is the term number multiplied by the common difference.
It's expressed as: a_1, a_1 + d^n, ..., a_1 + n^2 d.
It's expressed as: a_1, a_1+d, a_1+2d, ..., a_1+(n-1)d.
It's expressed as: a_1, a_2, a_3, ..., a_n.
It's expressed as: a_1 + a_2, a_2 + a_3, ..., a_n + a_{n-1}.