Question

Find the first negative term of ap 129, 120, 111, 102, ...............

Answer 1

The 16th term will be the first negative term.

Step-by-step explanation:

Consider the provided A.P

129, 120, 111, 102, ...............

Here first term = a = 129

The common difference is:

d = 120-129 = -9

$a_{n} < 0 \\ \\ a + (n - 1)d < 0 \\ \\ 129 + (n - 1)( - 9) < 0 \\ \\ - 9(n - 1) < - 129 \\ \\ n - 1 >\frac{129}{9} \\ \\ n >14.333+ 1 \\ \\ n >15.333\\ \\n\approx16$

Hence, the value of n should be 16.

The 16th term will be the first negative term.

#Learn more

Which term of AP 129, 125, 121, .... is its first negative term? Give full solutions.

https://brainly.in/question/2732485

Answer 2

Answer:

The answer is attached