Write the term to term rule, position-to-term (nth term) and 20thterm of the sequence 3, -1 ,-5, -9, -13 ,....

Mose asked Dec 10, 2023

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Mose asked Dec 10, 2023

by Mose

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17 votes

It's a arithmetic sequence

Nth term rule:-

$\\ \rm\Rrightarrow a_n=a+(n-1)d$

$\\ \rm\Rrightarrow a_n=3+(n-1)-4$

$\\ \rm\Rrightarrow a_n=3-4n+4$

$\\ \rm\Rrightarrow a_n=7-4n$

20th term

$\\ \rm\Rrightarrow a_(20)=7-80=-73$

TheRana answered Dec 16, 2023

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