Solve the problem.
The finite sequence whose general term is
an = 0.18n? - 1.08n + 7.83
where n = 1, 2, 3, ..., 9 models the total operating costs, in millions of dollars, for a
company from 1991 through 1999.
Find ai
i=1

x= -3 and

step-by-step explanation:

to find the roots of a cubic, use division or factoring to find the factors then set equal to 0. as this is a difference of cubes, it factors into

where a is the cube root of .

here   this is 27 and the cube root of 27 is 3. so we write using the form:

.

set each factor to 0 and solve for x.

x-3=0

x=3

the quadratic expression does not factor and must be solved using the quadratic formula.

where a = 1, b=3, and c=9

this cubic has two complex roots.

42.4

step-by-step explanation:

convert to decimal

step-by-step explanation:

yes it represnts a functio, their are not 2 of the same numbers on the both sides

multiply each one by 3.14

step-by-step explanation: