Question

which term of the ap is 45, 41, 37, 33,........ what is the first negative term

Answer 1

a=45 d=-4

nth term= 45+(n-1)x(-4)= 49-4n

now, for negative term 49-4n less than 0

⇒4n is greater than 49

n is greater than 49/4

hence least value of n is 13

13 th term is the first negtive term

Answer 2

The difference between the numbers is -3 therefore by subtracting such as 33-4,29-4,.............1-3 therefore the first negative term is -3