can anyone tell me this answer
1) state the 5th and 6th terms of triangular numbers what square number will we get if we add these two numbers?
plzzz help me it's urgent
Answers
Answered by
39
5TH TRIANGULAR NUMBER IS 15
As n(n+1)/2 = 5(5+1)/2 = 5(6)/2 = 30/2 = 15
And same with 6th TRIANGULAR NUMBER which is 21 .
Now, by adding
we will get 15+21 = 36
And 36 is a perfect square.
As 6×6=36
Hope it helps..!
As n(n+1)/2 = 5(5+1)/2 = 5(6)/2 = 30/2 = 15
And same with 6th TRIANGULAR NUMBER which is 21 .
Now, by adding
we will get 15+21 = 36
And 36 is a perfect square.
As 6×6=36
Hope it helps..!
Answered by
8
Triangular numbers: 1,3,6,10,15,21,28 etc
5th and 6th term = 10 and 15
10 + 15 =25=5^2
This is the right answer
2^2=4=1+3
3^2=9=3+6
4^3=16=6+10
5^3=25=10+15 and so on
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