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3 years ago

Find the 15th term of the arithmetic sequence.

Mathematics

2 answers:

krek1111 [17]3 years ago

7 0

The answer is
c. 15a + 1

Aneli [31]3 years ago

5 0

It's all about matching patterns.

The coefficient of "a" in the given sequence is the term number (1, 2, 3, ...) and the constant remains constant at 1. Thus the 15th term can be expected to be ...
c. 15a + 1

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marishachu [46]

<h3>Answer:</h3>

d = 2

<h3>Solution:</h3>

We are given that the arithmetic progression is defined by :

➝ 2n + 1

Therefore, 

For first term

➙ n = 1

➝ 2 × 1 + 1

➝ 2 + 1

➝ 3

For second term

➙ n = 2

➝ 2 × 2 + 1

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➝ 5

Common difference

➙ 2nd term - 1st term

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<h3>More information:</h3>

The difference between the successive term and the preceding term is the difference of an arithmetic progression. It is always same for the same arithmetic progression.

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Answer:

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Step-by-step explanation:

2x + 45 = 90

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2x = 45

x = 45/2 = 22.5 cm

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