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Pre-Calculus TEST 2
Terms in this set (20)
in rational inequalities
to get an x intercept of an inequality...
equal the numerator to 0
to get the VA of an inequality...
equal the denominator to 0
To find the inverse of a function
1 switch x and y
2 equal to f^-1(x)
3 verify by plugging in f(x) into f^-1(x) your supposed to get X by itself.
exponential functions special points are...
(-1,1/a) (0,1) (1,a)
when a sign is outside of parentheses...
you follow the sign up or down
when the sign is on the leading terms exponent you...
reflect across the y axis
type in 2nd then hit LN on your calculator to get...
the value of E
when switching from logarithm and exponential...
switch the y an x value and add a log before the base.
y=a^x to x=log a^y
logarithms can't be...
negative or they are not real
less than the base and exponent or they are 0.
logarithmic is the opposite
common and natural...
if the sign is in the parentheses...
shift horizontally left or right but do the opposite of what the sign is.
logbM+logbN = logb(M*N)
logb(M/N) = logbM-logbN
logbM^r = RlogbM
when bases match= 1
when result is 1= 0
to find the sum or difference of logarithms
1 start with quotient rule /
2 continue with product rule x
3 continue with power rule exp
4 look at the base properties such as LNe=1; log1=0; log10=1
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