Question

What is the
e 9th term of the arithmetic sequence with first term 10 and common difference-1/2​

Answer 1

Answer:

6

Step-by-step explanation:

a+(n-1)d=an

a+8d=a9

10+8(-1/2)=a9

10-4=a9

6=a9

Answer 2

9th term of the arithmetic sequence is 6

Given:

First term = 10 and common difference = -1/2​

To find:

9th term of the arithmetic sequence

Solution:

As we know nth term of Arithmetics sequence = a+(n-1)d

Here a = first term of sequence

        d = common difference

From given data a = 10 and common difference d = -1/2

9th term of data = a + (9-1)d

⇒ a + 8d = 10 + 8(-1/2) = 10 - 4 = 6

9th term of the arithmetic sequence = 6

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