Question

The sum of (x+3) observations is (x^4-81). Find the sum of the observations.

Answer 1

no. of observation,N= (x+3)
sum of observation = (x^4-81)

Mean = sum of observation/no. of observation
Mean= (x^4-81)/(x+3)
= [(x^2)^2 - (3^2)^2]/(x+3)
= (x^2-3^2)(x^2+3^2)/(x+3)
= (x+3)(x-3)(x^2+3^2)/(x+3)
= (x-3)(x^2+3^2)
= x^3-3x^2+9x-27

I hope this will help you

thanks for watching the answer