Position in the sequence triangular number relation
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
Answer:
1.084
Step-by-step explanation:
Answer: 5.4
Step-by-step explanation:
Answer:
503
Step-by-step explanation:
10 squared is 100
so you get 5x100+3
multiply 5x100 to get 500
add 500+3 and you get 503