SOLUTION: The patterns array problem 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 What patterns can be found in t

Question 850848: The patterns array problem
1
2 3 4
5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23 24 25
What patterns can be found in the array? Explain you thinking in responding to the following questions. Do not just provide an answer.
a. What is the first term of the nth row? The last term of the nth row?

b. What is the sum of ALL the terms in the first n rows?

c. What is the total number of terms in the first n rows?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
c) 1,3,5,7,9
a = 1 + 2(n - 1)
an=1+2n-2
an=2n-1

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