Algebra

Sequences & Series Solutions

Find a, for the arithmetic sequence with a₁ = 5,d = −4, n=98.
(a) -392
(b) -387
(c) -383
(d) 393
Determine the seating capacity of an auditorium with 30 rows of seats if there are 25 seats in the first row, 28 seats in the second row, 31 seats in the third row, and so on.
(a) 1635
(b) 1792
(c) 2055
(d) 3125