Question

The mean of x¹ and x² is 6 and mean of x¹, X², X³, is 7. Find the value of x³​

Answer 1

Step-by-step explanation:

x + x² = 12 ------(1)

x+x²+x³ = 21 ------(2)

equation (1) & (2) Se

12 + x³ = 21

x³ = 9

Answer 2

Step-by-step explanation:

x+ x^2 / 2 = 6

x+x^2 = 12

now

(x+ x^2 + x^3)/3= 7

X+x^2 +x^3 = 21

put the value of X +x^2 we get

12 + x^3 = 21

x^3 = 21-12= 9