Question

Find the value of n in the equation is an=3+(n-1)*12
an=243​

Answer 1

here a=3 , d=12 an=243

an= a+(n-1)*12

243=3+(n-1)*12

243=3+12n-12

243= -9+12n

243+9 = 12n

252 = 12n

12n = 252

n=252/12

n=21

hope it helps

Answer 2

Hi buddy

Here is your answer

An =3 +(n-1)*12

243=3+(n-1)12

243 =3+12n-12

243 =-9 +12n

243 +9 =12n

252 =12n

21=n

Hope it help you

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#sibi ❤️