Question

if a=3 ,d=3 an=81 find n​

Answer 1

Answer:hmm

Step-by-step explanation:

a=3

d=3

an=81

Therefore,

an=a +(n-1)d

81=3+(n-1)3

81-3/3=n-1

26=n-1

n=27

Answer 2

$\huge\bold\pink{ANSWER:}$

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Step by step solution:

$We \ know \ that \ a_{n}=a+(n-1)d\\\\putting \ value \ here\\\\a_{n}=a+(n-1)d\\\\81=3+(n-1)3\\\\81-3=(n-1)3\\\\(n-1)=\frac{78}{3}\\\\ n=26+1\\\\n=27$

Hope it is clear to you