
Rob D.
asked 06/04/15Solve the following applications
The first row of an amphitheater contains 50 seats, and each row
thereafter contains 8 additional seats. Write the first ten terms
of this arithmetic progression and find the number of seats in
the tenth row.
thereafter contains 8 additional seats. Write the first ten terms
of this arithmetic progression and find the number of seats in
the tenth row.
So for this problem do I keep adding 8 into each row? such as 50 turns into 58 then 58 turns in 66 etc?
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1 Expert Answer
SURENDRA K. answered 06/04/15
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a1=50
d=8
an=a1+(n-1)d
a2=50+8=58
a3=50+2*8=66
a4=50+3*8=74
a5=50+4*8=82
a6=50+5*8=90
a7=50+6*8=98
a8=50+7*8=106
a9=50+8*8=114
a10=50+9*8=122
no of seats in tenth row=122
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David W.
06/04/15