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Un = n*(n+1)/2

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12y ago

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Related Questions

What is the general term of the sequence 0 1 1 2 2 3 3.?

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A triangle that is in a sequence


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The general term of a sequence is a formula that describes the nth term of the sequence. In this case, the sequence alternates between 2 and 4. So, the general term can be expressed as a piecewise function: a_n = 2 if n is odd, and a_n = 4 if n is even. This formula represents the pattern of the sequence where every odd term is 2 and every even term is 4.


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a right angle triangle has a right angle in it, whereas a traingle is the extremely general term for an object with three sides


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What general rule for a geometric sequences?

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A geometric sequence is a sequence of numbers where each term after the first is found by multiplying the previous term by a fixed, non-zero number called the common ratio. For example, in the sequence 2, 6, 18, 54, the common ratio is 3. The general form of a geometric sequence can be expressed as ( a_n = a_1 \cdot r^{(n-1)} ), where ( a_1 ) is the first term, ( r ) is the common ratio, and ( n ) is the term number.