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IGCSE MATHS Doubts

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ksitna:

--- Quote from: Mr.DitD on May 11, 2010, 05:08:21 pm ---Hello everyone!!

I had a confusion about the decimal points. When exactly do we have to put decimal point and we do we have to write whole number?!?!  ???

--- End quote ---


u mean like significant figures?
or standard form?

if u meant the answer in the exam
basically write the answers to 2 decimal places

$H00t!N& $t@r:

--- Quote from: A@di on May 11, 2010, 04:47:16 pm ---if u havent learnt log. try this method

f-1(1) means, for what value of x in 10x will u get 1

answer = 0

for e.g f(x) = x+2

          f-1x = x-2

f(2) = 4

put 4 in f-1x and u shud get 2

4 -2 = 2

see?

simple.

--- End quote ---
Can you plz give me some more examples on such kind of ques.

holtadit:
I remember our teacher giving a horrible explanation about how all rhombuses are squares bla blah


AND


that some parallelograms can be rectangles or soemthing along those lines.

Can someone please please explain this..

Ghost Of Highbury:

--- Quote from: Shooting Star on May 11, 2010, 05:21:09 pm ---Can you plz give me some more examples on such kind of ques.

--- End quote ---

check the attached image.

f(x) and f-1(x) is given

u put any values of f-1(x) and calculate u shud get the corresponding value of f(X)

its called one to one function

Dibss:
Ari, see if these help :]
http://www.algebra.com/algebra/homework/Rectangles/Different-between-parallelogram-rectangle-square-rhombus-and-trapezoid.lesson
http://regentsprep.org/Regents/math/geometry/GP9/LRectangle.htm

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