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04.08.2019 •
Mathematics
The first figure takes 5 matchstick squares to build, the second takes 11 to build, and the third takes 17 to build. how many matchsticks will it take to build the nth figure?
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Ответ:
Ответ:
3x-12
Step-by-step explanation:
m−5(m+3) +7m
m-5m-15+7m=3m-15
For m=x+1
3(x+1)-15=3x+3-15=3x-12