abby20164
14.01.2021 •
Mathematics
What is the decimal equivalent of 1/5?
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Ответ:
.20
Step-by-step explanation:
1 divided by 5 is .20
Ответ:
1 1 1 = 1*(1+1)/2
2 3 3 = 2(2+1)/2
3 6 6 = 3(3+1)/2
4 10 10 = 4(4+1)/2
5 15 15= 5(5+1)/2
Call n the position in the sequence, then the triangular number is: n(n+1)/2