Question

if a=7, d=2 then find t38​

Answer 1

Answer:

see we know tn=a+(n-1)d

t38= 7+(37)*2

=81 ans

Answer 2

Answer:

a=7 , d= 2

a

an= a + (n-1)d

an=38

38= 7+(n-1)2

38= 7+ 2n-2

38= 2n+ 5

2n= 38-5

n=33/2