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lozanna [386]
1 year ago
15

I need help with this please

Mathematics
1 answer:
pochemuha1 year ago
7 0

Answer: 1. x^2-5x+4

2. x^2-7x+6

3. x^3-7x^2+11x-5

4. x-5

Step-by-step explanation:

1. x^2-6x+5+x-1=

x^2-6x+x+5-1=x^2-5x+4

2. x^2-6x+5-(x-1)=

x^2-6x+5-x+1=

x^2-6x-x+5+1=x^2-7x+6

3. (x^2-6x+5) * (x-1)=

x(x^2-6x+5)-1(x^2-6x+5)=

x^3-6x^2+5x-x^2+6x-5=

x^3-6x^2-x^2+5x+6x-5=x^3-7x^2+11x-5

4. (x^2-6x+5)/(x-1)=

(x^2-x-5x+5)/(x-1)=

(x(x-1)-5(x-1))/(x-1)=

(x-5)(x-1)/(x-1)=x-5

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Answer:

the common ratio is either 2 or -2.

the sum of the first 7 terms is then either 765 or 255

Step-by-step explanation:

a geometric sequence or series of progression (these are the most common names for the same thing) means that every new term of the sequence is created by multiplying the previous term by a constant factor which is called the common ratio.

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