Answer:
[tex]946[/tex]
Step-by-step explanation:
we know that
The formula to find the sum is equal to
[tex]S=(a1+an)n/2[/tex]
where
a1 is the first term
an is the last term
n is the number of terms
In this problem we have
[tex]n=11[/tex]
[tex]a1=(98-2(1))=96[/tex]
[tex]an=(98-2(11))=76[/tex]
substitute the values in the formula
[tex]S=(96+76)(11/2)=946[/tex]
