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karush

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MHB

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$\tiny{act.al.4}$

The 3rd and 4th terms of an arithmetic sequence are 13 and 18, respectively. What is the 50th term of the sequence?

$a.\ {248}\quad b.\ {250}\quad c.\ {253}\quad d.\ {258}\quad e.\ {263}$

ok according to Sullivan's textbook

$a_1=a\quad a_n=a_{n-1}+d$

so $d=5$ and $a_1=3$

and the

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

then

$a_50= 3+ (50 -1)5=$

The 3rd and 4th terms of an arithmetic sequence are 13 and 18, respectively. What is the 50th term of the sequence?

$a.\ {248}\quad b.\ {250}\quad c.\ {253}\quad d.\ {258}\quad e.\ {263}$

ok according to Sullivan's textbook

$a_1=a\quad a_n=a_{n-1}+d$

so $d=5$ and $a_1=3$

and the

*nth*term is$a_n = a_1 + (n -1)d$

then

$a_50= 3+ (50 -1)5=$

**248**
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