Lesson 14 - Solving Exponential Equations & Inequalities
Lesson 14 - Solving Exponential Equations & Inequalities
Lesson 14 - Solving Exponential Equations & Inequalities
2
Solve equation 9x = 3x+3
Property of Exponential Inequalities
If b > 1, then the exponential function
x
y = b is increasing for all x. This
x y
means that b < b if and only if x < y.
If 0 < b < 1, then the exponential
x
function y = b is decreasing for all x.
x y
This means that b > b if and only if
x < y.
Solve inequality 3x < 9x-2
x x x+1
(4/6) ≥ 36/16 5 > 25
5. At time t = 0, 480 grams of an
isotope with a half life of 30 hours is
present. How much time will have
elapsed when only 15 grams
remain?
The amount of substance after t
t/30 t/30
hours 480 ( ½) 480 ( ½) = 15
Page 91 of the CG for the test
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