Write the first four terms of the sequence defined by each of the following recursive formulas.
a1 = 3 and an = an − 1 − 3
a1 = 2 and an = an − 1 + 0.5

Applying the recursive formulas, it is found that:

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First sequence:

The first sequence is given by:

The first term is . The next terms are:

The first four terms of the first sequence are: {3,0,-3,-6}.

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Second sequence:

The second sequence is given by:

The first term is . The next terms are:

The first four terms of the second sequence are: {2,2.5,3,3.5}.

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