SOLUTION: the numbers of seats in the first 12 row of a high school auditorium form an aritmetic sequence the first row has 9 seats the second row has 11 seats write a recursive formula to r

Question 1076457: the numbers of seats in the first 12 row of a high school auditorium form an aritmetic sequence the first row has 9 seats the second row has 11 seats write a recursive formula to represent the sequence. write an expicit formula to represent the sequence. how many seats are in the 12th row
Answer by Herdaysoji(25) (Show Source): You can put this solution on YOUR website!
first term of an A.P (a)=9
second term, (T2)=a+d,11=9+d
d=11-9=2
the 12th term, (T12)=a+(n-1)d
.'.(T12)=a+(12-1)d, =9+(11).2=31
the 12th ter mm is 31
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