Question

Which term of the AP 115, 110, 105,......
is its first negature term?
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Answer 1

Answer:

100 because it difference is 5 minus 105-5=?

100

Answer 2

AP 115, 110, 105,......

the the first negative term in the given series will be -5

let nth term be -5

=> a + (n-1)d = -5

=> 115 + (n-1)(-5) = -5

=> (n-1)(-5) = -120

=> n - 1 = 24

=> n = 25

therefore 25th term of the ap is its first negative term