Math, asked by sangeetahansdasarkar, 4 months ago

find the value of a-1/a when a4+1/a4=322

Answers

Answered by Felicx
3

Answer:

4 (Brainliest Please)

Step-by-step explanation:

If a – 1/a = k then a4 + 1/a4 = (k2 + 2)2 – 2

⇒ a4 + 1/a4 = 322

⇒ 322 = (k2 + 2)2 – 2

⇒ 322 + 2 = (k2 + 2)2

⇒ √324 = (k2 + 2)

⇒ 18 = k2 + 2

⇒ 18 – 2 = k2

⇒ k = √16

⇒ k = 4

∴ a – 1/a = 4

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