nub question

[LachyMc]

what is the difference between a function "increasing" and "strictly increasing" ?

[LachyMc]

the square root of x^2 is modulus x? Do you need to restrict the domain or anything special?

and what does "sign(x)" mean i got it when i derived a modulus function in last years exam.

[LachyMc]

Also...In the 2008 exam 2 question 4b how does it cancel down? Thanks
Sorry for all these noob questions, im going through all my previous practice exams so cheers for any help i may recieve.
Also how come there isnt more activity on the methods forums ? Its only a week away

[supernatural]

the square root of x^2 is modulus x? Do you need to restrict the domain or anything special?

and what does "sign(x)" mean i got it when i derived a modulus function in last years exam.

signum(x) is a function on ur calculator.
ur better off differentiating it by hand by turning it into a hybrid function.

and yes the squareroot of x^2 is absolute value of x
for example what is squareroot of (-3)^2? its 3
just substitute numbers and you'll get a good idea.

[TrueTears]

what is the difference between a function "increasing" and "strictly increasing" ?

http://mathworld.wolfram.com/IncreasingFunction.html