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the range of f(x)= 3 sec 2x is

 Jan 15, 2019

Best Answer 

 #1
avatar+18337 
+1

Sec is 1/cos

Cos ranges from 1 to -1     

as cos nears zero   sec  ranges to+- infinity

the 3 multiplier changes the range to start at 3 and -3

 

range :     (-inf,-3]  U  [3,+inf) 

 

or       -3 >=  y >= 3

 Jan 15, 2019
edited by ElectricPavlov  Jan 15, 2019
 #1
avatar+18337 
+1
Best Answer

Sec is 1/cos

Cos ranges from 1 to -1     

as cos nears zero   sec  ranges to+- infinity

the 3 multiplier changes the range to start at 3 and -3

 

range :     (-inf,-3]  U  [3,+inf) 

 

or       -3 >=  y >= 3

ElectricPavlov Jan 15, 2019
edited by ElectricPavlov  Jan 15, 2019

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