Question

what is the sum of the first three negative integers ?​

Answer 1

Answer:

the sum of the first three negative integer is -6

Answer 2

Answer:

first three negative integers are :

-1,-2 and -3

so,-1+(-2)+(-3) = -1-2-3 = -6

another method :

here, a=-1,n=3 and l(last term)=-3

so,sum of first three negative integers=n/2(a+l) = 3/2(-1-3)

=3/2(-4) = -12/2 = -6

hence,the answer is -6