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1 year ago

the rule for being the nth item in a certain sequence is n(n+1)/2. what is the 4th term in this sequence ? a.) 4b.)10c.)16d.)20

Mathematics

1 answer:

abruzzese [7]1 year ago

3 0

The 4th term of the sequence can be determined as,

$\begin{gathered} a_n=\frac{n(n+1)}{2} \\ a_4=\frac{4(4+1)}{2} \\ a_4=10 \end{gathered}$

Thus, option (b) is correct.

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2 years ago

Read 2 more answers

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9514 1404 393

Answer:

axis of symmetry: x = 2

see below for a graph

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In this question:

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