Question

AP 18,13______3 fill the blank​

Answer 1

Answer:

AP 18, 13, 8, 3

Step-by-step explanation:

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Answer 2

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$a_1 = 18$

$a_2 = 13$

$d\:or\:a_2 - a_1=13-18$

$d=-5$

number of terms = $a_n$

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

$3 = 18 +(n-1) -5$

$3 = 18 -5n + 5$

$3-23=-5n$

$-5n=-20$

$n={\frac{20}{5}}$

$n=4$