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Sagot :
Blocks would he need on the 12th step of the pattern is 34.
The correct option is A
What is series?
A series is the cumulative sum of a given sequence of terms.
Given:
We can write the series as follows:
1,4,7,10,13,.......
First term =1
common difference= 4-1=3
Using Arithmetic series
[tex]a_{12}\\[/tex]= a+11d
= 1 +11*3
= 1+33
= 34.
Hence, 34 blocks need on 12th step.
Learn more about arithmetic series here:
https://brainly.com/question/2171130
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