The first four terms of an arithmetic sequence are given below.
Choose the algebraic expression that represents the nth
term in this sequence.
10, 13, 16, 19, . . .
3n + 10
3n
3n - 7
3n + 7
10n - 3
4
Right! The expression you selected, 3n + 7, is correct.
The student got this item correct.
1
Sorry, the expression you selected, 3n + 10, is incorrect. The sequence in the question is: 10, 13, 16, 19,... But the expression you selected describes the sequence: 13, 16, 19, 22,...
The student did not get this item right.
2
Sorry, the expression you selected, 3n, is incorrect. The sequence in the question is: 10, 13, 16, 19,... But the expression you selected describes the sequence: 3, 6, 9, 12,...
The student did not get this item right.
3
Sorry, the expression you selected, 3n - 7, is incorrect. The sequence in the question is: 10, 13, 16, 19,... But the expression you selected describes the sequence: -4, -1, 2, 5,...
The student did not get this item right.
5
Sorry, the expression you selected, 10n - 3, is incorrect. The sequence in the question is: 10, 13, 16, 19,... But the expression you selected describes the sequence: 7, 17, 27, 37,...
The student did not get this item right.
ExplicitArithmetic