Find an explicit formula for the arithmetic sequence -11,-3,5,13,...

2 answers:

4 0

Tn=-11+8(n-1). n represents which number of the sequence you will find, so if you plugged in a 3 you would find the third number in the sequence.

ikadub [295]3 years ago

3 0

In this sequence, a1 = -11, k = 8

So an = a1 + (n-1)k = -11 + (n-1)*8 = 8n - 19

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-------------------------------\\\\
\begin{array}{llccll}
&{{ 4}}x^2&{{ +10}}x&{{ +7}}\\
&\uparrow &\uparrow &\uparrow \\
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\end{array}
\\\\\\
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