Answer:
The sum is 190.
Step-by-step explanation:
This is an arithmetic series with first term 1, common difference 1 , last term 19 and containing a total of 19 terms.
Sum of n terms an = (n/2)[a1 + L] where a1 = the first term and L = the last term.
So here, a19 = (19/2)( 1 + 19)
= 9.5 * 20
= 190.
