Question

the sum of (x+5) observations is (xpower3+125).find the mean of the observations​

Answer 1

Answer:x²-5x+25

Step-by-step explanation:

According to the algebraic formula

a³+b³= a²-ab+b²

Now we have sum of (x+5) no of observations as x³+125 which can be expressed as x³+5³

Now mean is nothing but

sum of Observations/no of observations

So,

(x³+5³)/x+5= x²-5x+25

Hence the result