ElectricPavlov

.25 is the same as   25 / 100   = 1/4

so you have    9  1/4   - 1/2   + 3/8      to add/subtrat fractions , you need to have a common denominator ....8  will work in this case (you could use 12 or 16   etc)

9 1/4   =  37 / 4   =   74/8

1/2 = 4/8

so you have     74/8 - 4/8 + 3/8   =  (74-4+3) / 8 = 73/8 =  9  1/8

4 + 2i    would be the other root.

180^o / 5 = ........ ^o

Make the numerator as large as possible :  10  9 8 7 6

and the denominator as small as possibe      1 2 3 4 5

Sorry....the lates just converted to soemthing readable.....

   to maximize the product, make the numberes as close together as possible

1 - 10 summ to 55    so     27 x 28    

   10   7   5   3   2   *     9   8   6   4   1       I suppose...   anyone else?

I think that should be   m-2    =    3    and 21    

      so  m = 1   and 19

Bummer......then I do not understand what your question is asking.....

I think you want the volume contained between the   7 and 14 cm radii?

Volume of cylinder = pi r^2 h  

Take the volume of the 14 cm cylinder   then subtract the 7 cm cylinder

pi (14^2)*(10)    - pi 7^2(10) = ........   cm ³

1 x 1    + 2x1   + 3x1   +4x1   + 5x1  +6x1   =   21

21 divided by 6 outcomes     21/6 = 3.5                            (I think)

x² + x³ + 9 = 8 + x² + x  

x + x² - 8 = x² + 2x - 5        ===>     x - 8   = 2x-5

x² + 9 – x³ = 8 + x – x³       ===>     x² +9 = b +x  

C ) 

3º grau, 1º grau, 2º grau.

Since it has a EVEN exponent    if x   is negative or positive    the  result will be a POSITIVE

   BUT the negative leading coefficint will always turn it back to NEGATIVE

     so as  x  goes  to  inf   OR  - inf     f(x) will always  go to   negative inf