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Posted by **sara** on Tuesday, September 4, 2012 at 2:31am.

(a) Write the sequence for the number of seats for the first 5 rows

(b) How many seats will be in the last row?

(c) What will be the total number of seats in the theater?

- Discrete Mathematics -
**MathMate**, Tuesday, September 4, 2012 at 8:27ama.

C(n)=16+4n

C(1)=16+4(1)=20

C(2)=16+4(2)=24

...

C(5)=16+4(5)=36

b.

C(50)=16+4(50)=?

c.

50

∑ C(i)

i=1

50

∑ 16+4i

i=1

16(50)+4sum(i)

=800 + 4[ 50(1+50)/2 ]

= 800+4(1275)

= 5900

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