Question

product of a term and its position of an arithmetic sequences 7,11,15......is 280.Find the term position of the term ​

Answer 1

Step-by-step explanation:

a=7

d=4

an=280

an=a+(n-1)d

280=7+(n-1)4

273=(n-1)4

273/4=n-1

68.25=n-1

n=69.25

280 is not in AP