A. Determine whether each sequence is geometric or not. If it is a geometric sequence, find the common ratio. 10, 100, 1000, 10 000 b. 10, -1, 1 , −1
10 100

b. Find the common ratio in the geometric sequence 4, 2, 1, Give a formula for the nth term of the sequence.

c. Determine if the sequence 4, 8, 16, 20 is geometric.

answer: ouch. thats difficult

step-by-step explanation:

d

step-by-step explanation:

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.