• Want to help us with this year's BoS Trials?
    Let us know before 30 June. See this thread for details
  • Looking for HSC notes and resources?
    Check out our Notes & Resources page

need help with question... (1 Viewer)

E

e7aine

New Member
Joined
Feb 13, 2006
Messages
6
Location
Sydney
Gender
Female
HSC
2006
Explain why all solutions of the equation 3sinx = x - 1 must lie between x=-2 and x=4.
 
T

Templar

P vs NP
Joined
Aug 11, 2004
Messages
1,979
Gender
Male
HSC
2004
We know that -1<=sinx<=1, so -3<=3sinx<=3.

For x<-2, RHS<-3 therefore equality will not exist.
Similarly for x>4, RHS>3.
 
You must log in or register to reply here.

Users Who Are Viewing This Thread (Users: 0, Guests: 1)

Top