Question

in an A.P If
a = 72 ,d=36
an=72
then n is​

Answer 1

Answer:

n=1

Step-by-step explanation:

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

$72 = 72 + (n - 1)36$

$0 = (n - 1)36$

$n = 1$

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Answer 2

Answer:

a= 72

d= 36

an = 72

an = a +(n -1 ) × d

72 = 72 + ( n-1) × 36

72- 72 = (n-1) × 36

0 / 36 = n - 1

0 = n-1

n= 1