20100489110014 20100489110014

13-05-2020
Mathematics

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The second term of a AP is 18 and the fifth term is 486. Find the a; first term b; common ratio.

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13-05-2020

Hello,

AP = arithmetic progression

Step-by-step explanation:

b + a = 18

18 + 3a = 486 ⇔ 3a = 468 ⇔ a = 156

b = 18 - a = 18 - 156 = -138

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