(statistics)
a grouped frequency distribution has class intervals of 120 to 122, 123 to 125, 126 to 128, 129 to 131, and 132 to 134.

a. identify the lower and upper stated limits for the class interval of 123 to 125.
b. identify the lower and upper stated limits for the class interval of 129 to 131.
c. identify the lower and upper real limits for the class interval of 123 to 125.
d. identify the lower and upper real limits for the class interval of 129 to 131.
e. find the midpoint of the class interval of 120 to 122.
f. what is the value of i for this distribution

(x3 + 6x2 + 2x - 6) • (x - 1)

step-by-step explanation:

polynomial long division :

3.2     polynomial long division

dividing :   x4+5x3-4x2-8x+6

                              ("dividend")

by         :     x-1     ("divisor")

dividend     x4   +   5x3   -   4x2   -   8x   +   6

- divisor   * x3     x4   -   x3            

remainder         6x3   -   4x2   -   8x   +   6

- divisor   * 6x2         6x3   -   6x2        

remainder             2x2   -   8x   +   6

- divisor   * 2x1             2x2   -   2x    

remainder               -   6x   +   6

- divisor   * -6x0               -   6x   +   6

remainder                     0

quotient :   x3+6x2+2x-6   remainder:   0