3 years ago

A GP has 8 terms, it's first and last terms are 0.3 and 38.4/, calculate the common ratio

Mathematics

1 answer:

gladu [14]3 years ago

5 0

Answer: The right answer is 2

Step-by-step explanation:

Write out the expression

T1; a = 0.3 ------------ (I)

T8; ar^7 = 38.4 ------------ (ii)

Substituting for 'a' in the second equation, we have;

0.3r^7 = 38.4

Divide both sides by 0.3

r^7 = 38.4/0.3

r^7 = 128

r = (128)^1/7

r = 2

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