Work Step by Step
Need to calculate the value of $n$ or n-terms. In order to this, we have formula $a_n=a_1+(n-1)d$ Thus, $-83=1+(n-1)(-3-1)$ or, $-83=1-4(n-1)$ or, $-4n=-88$ This implies $n=22$, that is, n-terms $=22$
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