Question

The sum of (x+3) observation is (x⁴-81) .find the mean of observation

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Answer 1

Hi friend

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Your answer

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Sum of (x + 3) observations = (x⁴ - 81)

Mean will be =

Therefore,

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The mean is (x - 3)(x² + 9)

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BelovedAngel Virtuoso

Hii

Sum of (x + 3) observation= (x⁴ - 81)

Mean = x⁴ - 81 / x -3

          = (x²)² - (9)² / x -3

          = (x²-9)( x²+9) / x -3

          = (x+3) (x-3) (x²+9) / x -3

          = (x-3) ( x²+9)

∴ (x-3) ( x²+9) is the mean ! 

hope this helps u!