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Maths Exercices

Evaluate variable expressions for number sequences

Find the first four terms of the sequence 4n-3, where n represents the position of a term in the sequence. Start with n=1.

To find the 1st term, plug in n=1.
4n-3=4(1)-3=4-3=1

To find the 2nd term, plug in n=2.
4n-3=4(2)-3=8-3=5

To find the 3rd term, plug in n=3.
4n-3=4(3)-3=12-3=9

To find the 4th term, plug in n=4.
4n-3=4(4)-3=16-3=13

The first four terms of the sequence are 1, 5, 9, 13.


Find the first four terms of the sequence 2n, where n represents the position of a term in the sequence. Start with n=1.

To find the 1st term, plug in n=1.
2n=21=2

To find the 2nd term, plug in n=2.
2n=22=4

To find the 3rd term, plug in n=3.
2n=23=8

To find the 4th term, plug in n=4.
2n=24=16

The first four terms of the sequence are 2, 4, 8, 16.