Find the partial sum of the 150th term in a sequence

Find the partial sum of the 150th term in a sequence

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial explains how to find the sum of an arithmetic sequence by using a specific formula. It begins with an introduction to arithmetic sequences and the importance of understanding the formula. The tutorial then demonstrates how to calculate the 150th term in the sequence using the formula. It further explains the application of the rule to find specific terms and concludes with calculating the sum of the first 150 terms.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary goal when dealing with an arithmetic sequence problem?

To find the product of the terms

To find the sum of the terms

To find the average of the terms

To find the median of the terms

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the challenge mentioned in calculating the 150th term?

The first term is unknown

The sequence is not arithmetic

Only the first five terms are given

The common difference is zero

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the common difference in the given arithmetic sequence?

6

150

11

5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the derived rule for the nth term of the sequence?

a_n = 6n - 11

a_n = 11n - 6

a_n = 11n + 5

a_n = 5n + 6

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the 150th term calculated using the derived rule?

By subtracting 11 from 150 and adding 6

By multiplying 11 by 150 and subtracting 6

By multiplying 11 by 150 and adding 6

By adding 11 to 150 and subtracting 6

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the sum of the first 150 terms of the sequence?

123,675

123,670

1,644

1,640

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the formula used to find the sum of an arithmetic sequence?

Sum = n * (first term + last term)

Sum = n/2 * (first term + last term)

Sum = n * (first term - last term)

Sum = n/2 * (first term - last term)