Question

given sequence is geometric 3,12,48,5y+7 find y

Answer 1

Answer:

Given that the sequence is a Geometric Progression.

⇒ a = 3

⇒ r = 12 / 3 = 4

Fourth term of this GP is: ar³

⇒ Fourth Term = 3 × 4³ ⇒ 3 × 64 ⇒ 192

⇒ 192 = 5y + 7

⇒ 192 - 7 = 5y

⇒ 185 = 5y

⇒ y = 185 / 5

⇒ y = 37

This is the required answer.

Answer 2

Your answer will be 37