Answer to Question #42500 in Calculus for shasha
Help me please
The general formula is: a_n=a_1+(n-1)d.
As the second row has 2 more seats then the first we can write that d=2.
The thirteenth row has a_30=a_1+(30-1)d=10+29*2=68 seats.
So in the auditorium are a_1+a_2+...+a_30 seats, or
Need a fast expert's response?Submit order
and get a quick answer at the best price
for any assignment or question with DETAILED EXPLANATIONS!