Question

a=? , d=-3 , n=18 , an=-5​

Answer 1

mi

Step-by-step explanation:

a+(n-1)d=an

a+(18-1)-3=-5

a+17*-3=-5

a-51=-5

a=-5+51

a=47

Answer 2

Answer:-

$\small\sf{an=-5}$

$\small\sf{d=-3}$

$\small\sf{n=18}$

━━━━━━━━━━━━━━━

$\small\sf{So\:putting\:the\:values}$

$\small\sf{an=a+(n-1)d}$

$\small\sf{-5=a+(18-1)(-3)}$

$\small\sf{-5=a-51}$

$\small\sf{a=46}$