anonymous
  • anonymous
The value -2 is a lower bound for the zeros of the function shown below. f(x)=4x^3-12x^2-x+15
Mathematics
  • Stacey Warren - Expert brainly.com
Hey! We 've verified this expert answer for you, click below to unlock the details :)
SOLVED
At vero eos et accusamus et iusto odio dignissimos ducimus qui blanditiis praesentium voluptatum deleniti atque corrupti quos dolores et quas molestias excepturi sint occaecati cupiditate non provident, similique sunt in culpa qui officia deserunt mollitia animi, id est laborum et dolorum fuga. Et harum quidem rerum facilis est et expedita distinctio. Nam libero tempore, cum soluta nobis est eligendi optio cumque nihil impedit quo minus id quod maxime placeat facere possimus, omnis voluptas assumenda est, omnis dolor repellendus. Itaque earum rerum hic tenetur a sapiente delectus, ut aut reiciendis voluptatibus maiores alias consequatur aut perferendis doloribus asperiores repellat.
chestercat
  • chestercat
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
True or false?
UsukiDoll
  • UsukiDoll
all positive values are upper bound all negative values are lower bound
anonymous
  • anonymous
is it false? I use synthetic division right? I got 4, -20, 39, 171

Looking for something else?

Not the answer you are looking for? Search for more explanations.

More answers

UsukiDoll
  • UsukiDoll
can you draw that synthetic division for me?
anonymous
  • anonymous
|dw:1437277905106:dw| sorry it's kind of hard to read but i just realized i messed up earlier haha is it still false though?
anonymous
  • anonymous
because not everything is negative??
anonymous
  • anonymous
i don't get it :/
UsukiDoll
  • UsukiDoll
\[f(x)=4x^3-12x^2-x+15 \] is our function oh I see we use -2 for synthetic division
UsukiDoll
  • UsukiDoll
|dw:1437278252692:dw|
UsukiDoll
  • UsukiDoll
so the first entry should go down |dw:1437278300525:dw|
UsukiDoll
  • UsukiDoll
then we multiply -2 x 4
UsukiDoll
  • UsukiDoll
|dw:1437278367948:dw| then use addition we should get -20
UsukiDoll
  • UsukiDoll
now -2 x -20 = 40 |dw:1437278417562:dw| and then we should have 39
UsukiDoll
  • UsukiDoll
|dw:1437278454846:dw|
anonymous
  • anonymous
yup thats what i got too!
UsukiDoll
  • UsukiDoll
so now we can re-write this the last part should be \[\frac{-63}{x-2} \] because -63 is the remainder
UsukiDoll
  • UsukiDoll
ok I'm going backwards in writing this since it's been a while
UsukiDoll
  • UsukiDoll
ack wrong sign \[4x^2 -20x+39-\frac{63}{x+2}\]
anonymous
  • anonymous
so would it be true or false?
UsukiDoll
  • UsukiDoll
since -2 < 0 and the signs during the synthesis division alternate, we have a lower bound for real roots of the function.
anonymous
  • anonymous
ohh. i get it, thank you :)
UsukiDoll
  • UsukiDoll
geez what is with my writing? I meant signs during the synthetic division alternate XD

Looking for something else?

Not the answer you are looking for? Search for more explanations.