# raven 31791

Popular questions and responses by raven 31791-
## pre-cal

The sq root of -4 (3-sq root of -9) a)6 +6i b)-6+6i c)6-6i d)-6-6i Again the i's are in italics. I would think that c and d could be eliminated because the answer is suppose to be in the form a + bi but they could be trting to trick you. I'm not quite sure

*asked on March 7, 2007* -
## Polynomiials

Find a polynomial function with real coefficients that has the given numbers as roots: 4, 0, 3, italic i a)x^4-4x^3 +9x^2-36x b)x^3-4x^2 -3x+12 c)x^3-4x^2 +3x-12 d)4x-4x^3 -9x^2 +36x My gut instinct is either b or c but I could be wrong. If it were b or c,

*asked on March 7, 2007* -
## Sequence

What is the fifth term of the sequence a sub n = 1/3^n? a)1/12 b)1/81 c)1/243 d)1/15 If the sequence starts at n = 1 (there is no reason why it should) then it is 1/243

*asked on March 8, 2007* -
## pre-cal

Find the roots of the function f(x)= x^2+2x+2 Determine f(x) a) (x+1-i)(x+1+i) b)(x+1-i sqrt of 2)(x+1+i sqrt of 2) c)x-1+i)(x-1-i) d)x-1+i sqrt of 2) (x-1-i sqrt of 2) Please Help! For all of these, use the rule [f(x) + ai]*[(f(x) - ai} = [f(x)]^2 + a^2

*asked on March 8, 2007* -
## Check Math Answers

What are the values of the trigometric functions; The choices are 1, -1, 0, undefined. tan(-270degrees) answer: undefined cot(-270 degrees) answer:0 sec(-270degrees) answer:undefined correct

*asked on March 8, 2007* -
## Sequences

Find the fifth term of the sequence a sub1 = 12, a sub n+1 = a sub n / n+1? a)1/10 b)1/30 c)12/5 d)1/2 12,6,2,1/2, 1/2 divided by 5

*asked on March 8, 2007* -
## Sequence

What is the fifth term of the sequence a sub n=5-n^2? a)-11 b)-20 c)-7 d)-5 I believe that the answer that fits the best is d, but I could be wrong.

*asked on March 8, 2007* -
## Roots and Pre-cal

Find the roots of the function f(x)= x^2 +2x+2 a)-1 + sq root of 2 and -1 - sq root of 2 b) -1 + i and -1 - i c)-1 -2i sq root of 2 and -1-2i sq root of 2 d)-1 +2i and -1-2i The i's are in italics but I can't .make them in italic here for some reason

*asked on March 7, 2007* -
## pre-calc

What is the trigonometric function for cos(-270)? a)1 b)-1 c)0 d)undefined Put cos(-270 degrees) in the google search engine.

*asked on March 8, 2007* -
## Sequence

What is the fifth term of the sequence a sub n=5-n^2? a)-11 b)-20 c)-7 d)-5 what is your thinking on this? I think that the answer is d, -5, that seems to be the most reasonable answer.

*asked on March 8, 2007* -
## pre calc

What is the fifth term of the sequence {2n - 1 / n}? a)4, b)14/5 c)7/4 d)9/5 assuming the first term is 1, and there is no good reason it should be, then 1,3/2, 5/3, 7/4, ...

*asked on March 8, 2007* -
## pre calc

what is the trigometric function of cos pi? a)0 b)-1 c)1 d)undefined Paste this in your Google search window: cos(PI)

*asked on March 8, 2007* -
## Pre Calculus

Find the roots of the function g(x)=x^3 +16x a)0,4i, -4i b)0,-4,-4i c)0,4,4i d)0,4,-4 The equation can be rewritten x(x^2 + 16) = 0 The function is zero if x = 0, OR if x^2 = -16 That should give you a hint of what the roots are. So you take the square

*asked on March 8, 2007*