Question

Which term of the Ap 21,18,15,..... is it's first negative term? ​

Answer 1

Answer:

10th term,please make Brainliest

Step-by-step explanation:

Here a1​=24,a2​=21

Common difference d=a2​−a1​=21−24=−3

⇒an​=a1​+(n−1)d (nth term formula)

We first find the value of n for which the value of n is zero

The next integer value of that n will be the term of first negative number

⇒an​=a1​+(n−1)d

⇒0=24+(n−1)(−3)

⇒−24=(n−1)−3

⇒8=n−1

⇒n=9

Hence, 10th term will be the first negative term of given AP

Answer 2

Answer:

-3

Step-by-step explanation:

3 is being subtracted from the previous number every time.

If you go on subtracting, you reach at -3 which is the first negative term