If R − 1 R = 4 ; Find : R 4 + 1 R 4 - Mathematics

If `"r" - (1)/"r" = 4`; find : `"r"^4 + (1)/"r"^4`

बेरीज

`("r"^2 + 1/"r"^2)^2`

= `"r"^4 + (1)/sqrt(4) + 2`

⇒ (18)² = `"r"^4 + (1)/"r"^4 + 2`

⇒ `"r"^4 + (1)/"r"^4`
= 324 - 2
= 322.

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पाठ 4: Expansions - Exercise 4.2

पाठ 4 Expansions
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