Question

if d=-3,n=18,an=-5,find 'a'

Answer 1

Answer:

-5/18

Step-by-step explanation:

If an = -5 where n=18

Then, a×18=-5

a×18/18=-5/18

(18/18=1)(a×1=1)

Anything you do in left hand side you have to do it in right hand side also

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Answer 2

$\huge\star\bold\red{ANSWER}$

$\star\bold\red{Given:-}$ d=-3,n=18,An=-5

$\star\bold\red{To}$ $\bold\red{Find:-}$ a=?

$\star\bold\red{Solution:-}$

As we know,

An=2a+(n-1)d

=>-5=2a+(18-1)×(-3)

=>-5=2a+17×(-3)

=>-5=2a-51

=>2a=51-5

a=$\frac{46}{2}$

a=23 $\bold\red{.....ans....}$

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$\huge\star\bold\red{THANK}$ $\huge\star\bold\red{YOU}$