Arithmetic Sequences; Finding a term given it's value.

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I must have missed this topic in my notes but my assignment is asking me to find which term has a value of 38 in the arithmetic sequence of 4, 5.7, 7.4, and I do not know the formula or method of doing so.

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1 Answer

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To find any term of an arithmetic sequence:

$$a_n=a_1+(n-1)d$$

where $a_1$ is the first term of the sequence and $d$ is the common difference , $n$ is the number of the term to find.

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