Question

The 30th term of the series    30, 25.5, 21, 16.5  is
a) 0
b) -100 1/2
c) -183
d) -133 1/2​

Answer 1

Answer:

a = 30

d = 25.5 - 30 = -4.5

n = 30

a30 = 30 + (30-1)(-4.5)

a30 = 30+ (29)(- 4.5)

a30 = 30-130.5

a30 = -100.5