Example 3 : what is the intersection between the two given functions
𝑓(𝑥) = 𝑥
2
+ 4𝑥 + 4 𝑎𝑛𝑑 𝑔(𝑥) = 3𝑥 + 6 𝑤ℎ𝑒𝑟𝑒 − 4 < 𝑥 < 4
Steps using calculator: make sure to be in the table mode
w8
Q)d+4Q)+4=3Q)+6=p4=4==
In order to locate the intersection point just check the table where
𝑣𝑎𝑙𝑢𝑒 𝑓(𝑥) = 𝑔(𝑥)
So the intersection point is (2,0)
Example 4: For what values of
𝑥, 𝑓(𝑥) = 𝑥
3
𝑖𝑠 𝑛𝑒𝑔𝑎𝑡𝑖𝑣𝑒 , 𝑖𝑛 𝑡ℎ𝑒 𝑑𝑜𝑚𝑎𝑖𝑛 − 3 ≤ 𝑥 ≤ 3
Steps using calculator: make sure table mode is activated
w8
Q)qd==p3=3==
Check the negative values of f(x) from the table with respect to “x”
Domain where f(x) is negative :
𝑥𝜖[−3,0)
Summary of Contents for fx-82EX
Page 1: ...Fx 82EX Booklet...
