module 5
module 6
module 7
100

log1,000,000

6

natural log base is 10

10^6=1,000,000

100

simplify (a+b) (a+b)

a2+ab+ba+b2


multiply with FOIL, (first outer inner last)

(a)(a)=a2  (b)(b)=b2  (a)(b)=ab  (b)(a)=ba

100

x+(2/x)=3 

2

get rid of the denominator x(x+(2/x))=x(3)

move it to one side x2-3x+2=0

(x-2) (x-1)

check for extranious, 2 works, 1 does not.

200

(23)4

212


multiply 3(4)=12

200

predict the number of roots

a(x)=x2+3x-10

2


An nth degree polynomial has n roots

200

(x2+8x+12)/(x2+3x-18)

(x+2)/(x-3)


simplify (x+6)(x+2)/(x+6)(x-3)

eliminate the identical ones (x+2)/(x+3)

300

29=512

9=log2(512)


the mmber becomes the base and the exponent becomes the number

300

find the zeros

f(x)=x2+20x=51

(-17,0) (-3,0)


(x+17)(x+3)

17+3=20

17(3)=51

300

Identify actual solutions, -1 and 5/2

a-(3/(2a+1))=2


both work


plug in the answers as "a"

(-1)-(3/(2(-1)+1))=2 it works

(5/2)-(3/(2(5/2)+1))=2 it works

400

10x=3162

x=3.5


x=log10(3162)

400

simplify

3x/6x2

x/2x2


factor (3)(x)/(3)(2x2)

eliminate the common factor x/2x2

400

what is the verticle asymptote of 

y=(x+4)/(-2x-6)

-4


set the denominator equal to zero and solve

(x+4)/0=y

x+4=0

x=-4

500

what is the compound interest formula

A=P(1+(r/n))nt

500

simplify

(3x(2x+7)(x-1)(6x-5))/(x(2x+7)(x-1)(6x-5))

3


remove common factors 3x/x

3x/x = 3/1 = 3

500

how do you find the horizontal asymptote

  • If the degree (the largest exponent) of the denominator is bigger than the degree of the numerator, the horizontal asymptote is the x-axis (y = 0).
  • If the degree of the numerator is bigger than the denominator, there is no horizontal asymptote.
  • If the degrees of the numerator and denominator are the same, the horizontal asymptote equals the leading coefficient (the coefficient of the largest exponent) of the numerator divided by the leading coefficient of the denominator