Qualification > Math
C1 and C2 DOUBTS HERE!!!!!
Saladin:
--- Quote from: halosh92 on May 28, 2010, 08:26:04 pm ---if u look at the marking scheme the curve is staring from 0.5 not from 0
--- End quote ---
exactly. I didn't get it either....
Darkstar3000:
the function f, defined for x is an element of R, x>0, is such that
F'(x)=x^2 - 2 + 1/x^2
a) Find the value of f''(x) at x=4
b) Given that f(3) = 0, find f(x)
c) Prove that f is an increasing function
my problem is part c i can do the first two, this is from Mixed exercise 9D Q3 in the c2 text book
Saladin:
--- Quote from: Darkstar3000 on May 30, 2010, 10:19:30 am ---the function f, defined for x is an element of R, x>0, is such that
F'(x)=x^2 - 2 + 1/x^2
a) Find the value of f''(x) at x=4
b) Given that f(3) = 0, find f(x)
c) Prove that f is an increasing function
my problem is part c i can do the first two, this is from Mixed exercise 9D Q3 in the c2 text book
--- End quote ---
On the case!
Enjoy.
Darkstar3000:
thx but where is (x - 1/x)^2 coming from
Saladin:
--- Quote from: Darkstar3000 on May 30, 2010, 12:52:58 pm ---thx but where is (x - 1/x)^2 coming from
--- End quote ---
That is the factorized version of f(x).
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