Results 1 to 2 of 2

Math Help - imaginary numbers help!!!

  1. #1
    Newbie
    Joined
    Feb 2009
    Posts
    2

    imaginary numbers help!!!

    i can't seem to answer these because i can't understand it..please help..

    Simplify the expression i2000049
    a. -1 b. i c. i d1/i


    The simplify ( -i + 2)2..
    a. 3 4i b 4 -3i c. 4i d. 3i


    The value of [(√-144) 12i)]is ______.
    a. 0 b.-1 c.1 d. 12i


    Simplify √-49 - √-36.
    a. 4i√2 b. 2i√2 c. 3i√2 d.i


    Which is the sum of (23i - 6) and (-√100 + 16i)?
    32i + 16 b. 30i + 24 c. 31i +14 d. 39i 16


    What is the equivalent of i16 + i48?
    a. 2 b. -1 c. i d. i


    What is the equivalent value of the expression (i17 + i27)2?
    a. 16 b. 12 c. 0 d. 8

    Which is the value of ( 5 i)2?
    a. -24 + 10i b. 24 - 10i c. -24 10i d. 24 + 10i


    What is the equivalent value of the expression (2 + 2 i)2?
    a. 2√2cis45 b. 2√2cis90 c. 4√2cis45




    thanks a lot!!please provide the solutions!
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Jan 2009
    Posts
    108
    Quote Originally Posted by pathurr19 View Post
    i can't seem to answer these because i can't understand it..please help..

    Simplify the expression i2000049
    a. -1 b. i c. i d1/i
    Every time you get i*i*i*i you really just have a 1. I'm interpreting your question as i^(20000049). Basically, just divide the power by 4 and change your answer into i^(remainder). Then simplify from there.


    The simplify ( -i + 2)2..
    a. 3 4i b 4 -3i c. 4i d. 3i
    Pretend i is a variable and follow the normal rules for distribution. Then simplify any i values with powers.


    The value of [(√-144) 12i)]is ______.
    a. 0 b.-1 c.1 d. 12i
    simplify the root, it'll work out well from there.


    Simplify √-49 - √-36.
    a. 4i√2 b. 2i√2 c. 3i√2 d.i
    simplify each radical and then look to combine like terms


    Which is the sum of (23i - 6) and (-√100 + 16i)?
    32i + 16 b. 30i + 24 c. 31i +14 d. 39i 16
    the question is wordy. just change the 'and' into a '+' and you're all set.


    What is the equivalent of i16 + i48?
    a. 2 b. -1 c. i d. i
    I'll assume those numbers are exponents, otherwise, this question is too easy. Look up my hint for solving i to a ridiculous power and use it here.


    is the equivalent value of the expression (i17 + i27)2?
    a. 16 b. 12 c. 0 d. 8
    simplify each i expression and then square what you get when you combine like terms.

    Which is the value of ( 5 i)2?
    a. -24 + 10i b. 24 - 10i c. -24 10i d. 24 + 10i


    What is the equivalent value of the expression (2 + 2 i)2?
    a. 2√2cis45 b. 2√2cis90 c. 4√2cis45
    break out your distribution skills (FOIL) and simplify i terms with powers.




    thanks a lot!!please provide the solutions!
    We're not here to do your homework. There are some hints. You probably have a textbook. You should consider reading it and then attempting the problems.

    I'm a high school math teacher. We did this material a few months ago and you should know that if you are a master of algebra 1, this lesson will be very easy for you.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. imaginary numbers...
    Posted in the Calculus Forum
    Replies: 5
    Last Post: April 17th 2011, 11:45 PM
  2. imaginary numbers....
    Posted in the Algebra Forum
    Replies: 3
    Last Post: June 26th 2010, 07:28 PM
  3. Imaginary numbers/complex numbers
    Posted in the Algebra Forum
    Replies: 7
    Last Post: August 25th 2009, 12:22 PM
  4. Imaginary Numbers
    Posted in the Algebra Forum
    Replies: 3
    Last Post: April 21st 2008, 10:58 PM
  5. Complex Numbers- Imaginary numbers
    Posted in the Algebra Forum
    Replies: 2
    Last Post: January 24th 2007, 01:34 AM

Search Tags


/mathhelpforum @mathhelpforum