(23/05/2010 01:01 PM)deathmock5 Wrote:  3. type of polynomial, classify it and what degree is it: f(x)=11x^2+8x-3

Degree 2 (highest exponent of x)

(23/05/2010 01:01 PM)deathmock5 Wrote:  5. an exponential function with a base of 4 and goes through the point (-1,1)

y = 4^x + c
let x=-1, y=1
1 = 4^-1 + c
c = 0.75

y = 4^x + 0.75

(23/05/2010 01:01 PM)deathmock5 Wrote:  7. solve log_(3) 27 - log_(3) 9
i think the answer to this one is 1

1, you can check with a calculator.

(23/05/2010 01:01 PM)deathmock5 Wrote:  8. explain how the change of base works with logarithms

log_a(x) ÷ log_a(y) = log_y(x)

^ I'm guessing that?
Unless they're asking for a proof...

(This post was last modified: 23/05/2010 07:32 PM by ZiNgA BuRgA.)