Recent content by w0lfed

nope, I've never seen that before?

Homework Statement Find the angle between the following vectors? A = -2.00i^ + 6.00j^ and B = 2.00i^ - 3.00j^ (the ^ means 'i hat') Homework Equations Theta = tan^-1 = (opposite/adjacent) The Attempt at a Solution i said for the first part of the component that theta(A)...

ok cool, i get that, but now do we make it positive or negative for -1 =< X =< 1 and then also...do we just leave and solve the values of X which are not absolute eg 3x like we would normally do thanks very much Tiny Tim for you help

i think i need a lil more help...? do we just make the absolute values negative for x=< - 1 or is there more to it like a sign table? my lecturer just threw about 20 methods at us in 2 mins and i get quite confused because i try and combine em all and everyone says something else :S

Homework Statement I previously left some absolute value questions which contained a few simple equations and equalities. i have a further question when it comes to slightly more complicated Absolute statements. Sketch the graph of y = 2|x-1| - 3|x+1| + 3x + 1 Homework Equations...

thanks for your help. i got the first one, but for the second one if |a|.|b| = |a.b| i then went on to say -> |x-1|.|x+2| = 3 -> |(x-1)(x+2)| = 3 -> |x^2 + x - 2| = 3 -> x^2 + x = 5 have i done this write and in what direction am i meant to go from here?

Homework Statement Find all real values of X | x - 1 | + | x + 1 | < 1 and | x - 1 | . | x + 2 | = 3Homework Equations The Attempt at a Solution some how i am thinking i should just solve em as is and all should be fine but i think I am lacking a lil bit of fundamental knowledge - some...

I am having some troubles with the beggining ideas about modulus and absolute values etc... i understand the basics about it but get a bit confused when they ask for the sum of different expressions or the product of different expressions eg |x - 1| + |x + 1| < 1 or |x - 2|.|3x...