Step-3

Title: The general term of the arithmetic progression

Grade: 9-a Lesson: S3-L8

Explanation: Hello Students, time to practice and review the steps for the problem.

Lesson Steps

Step Type Explanation Answer

1

Problem

Find the general term of the arithmetic progression
-1.3,-1.6,-1.9,-2.2…​

2

Step

The given sequence is -1.3,-1.6,-1.9,-2.2…​

3

Step

The first term is

a = -1.3

4

Step

The common difference is

d = -1.6-(-1.3) = -1.6 + 1.3 = -0.3

5

Formula:

The general term of an AP is calculated by the formula

\$ a_n = a + (n-1)d\$

6

Hint

Substitute a,d values in formula

\$ a_n = -1.3 + (n-1)(-0.3)\$

7

Step

The general term of the given AP is

\$ a_n = -0.3n - 1\$

8

Answer

C

Tutor: Questions

Seq Type Question Audio

1

Problem

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2

Clue

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3

Hint

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4

Step

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5

Step

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