Question

1,2,3,4,5,1,2,3,45,1,2,3,4,5..........
Sum of the first 2019 tems in the
sequence is ......​

Answer 1

Answer:

Step-by-step explanation:

he infinite series whose terms are the natural numbers 1 + 2 + 3 + 4 + ⋯ is a divergent series. The nth partial sum of the series is the triangular number. ∑ k = 1 ...

Answer 2

a=1, d=2-1=1 , n=2019

an= a+ (n-1)d

= 1+2018 * 1

=2019

Sn = n/2 +a(n-1)d

=2019/2 + 1*2018 *1

=2019/2 +2018

= 2019+ 4036/2

= 3027.5

Step-by-step explanation:

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