Question

Arithmetic Series?

Answer 1

`92`

Explanation:

`"this is an arithmetic series whose sum is given by"`

`•color(white)(x)S_n=n/2[2a+(n-1)d]`

`"where a is the first term and d the common difference"`

`"here "a=8,d=1" and "n=8`

`S_8=8/2[(2xx8)+(7xx1)]`

`color(white)(xx)=4(16+7)=4xx23=92`