Answered

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1,3,6,10,15,21,28,36,45,55,66,78
Describe the pattern shown above

Sagot :

Jaimi412idn
1+2=3
3+3=6
6+4=10
10+5=15
So on..

When increasing in numbers, it adds 1 more than the last. 
AL2006idn
The nth term is the [ (n-1)th term + n ] .
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