Arithmetic Sequences and Variable Elimination

This video tutorial from the Pembelajar Matematika channel explains how to solve an arithmetic sequence problem. The problem involves finding the 20th term of a sequence given the 3rd and 8th terms. The tutorial walks through setting up equations, solving for variables, and calculating the desired term, providing a clear and detailed explanation of each step.

What is the main topic discussed in this video?

• Finding the sum of an arithmetic sequence

• Solving quadratic equations

• Calculating the 20th term of an arithmetic sequence

• Understanding geometric sequences

What is the value of the 3rd term in the sequence?

• 11

• 5

• 3

• 26

Which equation represents the 8th term of the sequence?

• a + 19b = 62

• a + 2b = 11

• a + 7b = 26

• a + b = 8

What method is used to eliminate the variable 'a' from the equations?

• Factoring

• Elimination

• Graphing

• Substitution

What is the value of 'b' after solving the equations?

• 3

• 11

• 5

• 26

After finding 'b', what is the next step to find 'a'?

• Use the quadratic formula

• Substitute 'b' into the first equation

• Graph the equations

• Multiply both equations

What is the value of 'a' after substitution?

• 3

• 11

• 5

• 26

How is the 20th term of the sequence calculated?

• a + 7b

• a + 2b

• a + 19b

• a + b

What is the final value of the 20th term in the sequence?

• 26

• 57

• 11

• 62

What should viewers do if they have questions about the video?

• Rewatch the video

• Search online

• Contact the teacher directly

• Write in the comments section