Qualification > Math

C1 and C2 DOUBTS HERE!!!!!

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Blizz_rb93:
What's the equation to finding the length of a line ??

astarmathsandphysics:
distance between 2 points

wakemeup:

--- Quote from: vanibharutham on May 14, 2010, 05:52:14 pm ---10a)

hmm

easy way to do this:

you know that the curve will cross the x-axis when y = 0
therefore, x = -3 and x = 1

You should also note that it is a cubic function

and that when x = 0 , y = 3

you know have three points

(0,3) (-3,0) and (1,0)

make sure it goes through those points and that it is cubic

here is a sketch:
http://www.wolframalpha.com/input/?i=plot+x%C2%B3+%2B+x%C2%B2+-5x+%2B+3

--- End quote ---


Ok, I got 7(d) but how exactly do you know whether the curve in 10(a) goes up then down or down then up.

astarmathsandphysics:
For cubics if it is x^3 not -x^3 graph will be like in the link

halosh92:
Q2
thx :)

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