Question

The sum of (x+5) observations is x⁴-625.find the mean of the observations​

Answer 1

Answer:

The mean of the observations​ is (X² + 5² )(X-5)

Step-by-step explanation:

Given : No of observations = (X + 5)

           Sum of observations = $X^{4}$ - 625

Solution : We know that Mean = Sum of observations/ no of observations

                                                  = $X^{4}$ -625 / ( X + 5)

                                                  =( $X^{4}$ - $5^{4}$) / (X+5)

                                  Factorizing the numerator,

                                                = ( X² + 5² ) ( X² - 5² ) / ( X + 5)

                                                = (X² + 5² ) ( X+5)(X-5)/(X+5)

                                                = (X² + 5² )(X-5)

Answer 2

Answer:

0

Step-by-step explanation:

(x+5)

x=-5

=>x⁴-625

=-5⁴ -625

=625-625

=0