Algebraic Patterns Practise
Algebra
Level
1
What is the 20th term in the sequence above?
77
20
79
78
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1 solution
This is an algebraic pattern, which means that there are numbers. Also, the numbers grow by an equal amount, so let's find an algebraic expression in order to solve this patter.
Since the numbers increase by 4 each time, we get 4n. In order to reach the term value, we subtract 3. This gives us 4n-3. Now, let's substitute 20 for n. Let n be the term number. (20)
4n-3 = 4(20)-3 = 80-3 = 77
Therefore, the value of the 20th term is 77.