Qualification > Math
IGCSE Maths doubt(paper 4)
sameer210394:
--- Quote from: @d!_†oX!© on October 30, 2009, 07:31:53 am ---ok guys, here i come with yet another unusual question.... ;D ;D
seriously i haven't seen this anywhere else :o :o
(x:15-2x?7)?(x:5x-2>10-x)
i though maybe ":" sign implies ratio which is actually division
so by taking division(ex, x/(15-2x) i tried to solve it...but this is where i could reach ann dunno how to go about it now :-[ :-[
(x?7)?(5x²-47x+20>0)
PLEASE HELP GUYS!!!!!!
--- End quote ---
solve both the inequalities separately...
15 - 2x >= 7 5x-2 > 10 - x
15 >= 7 +2x 6x -2 >10
8 >= 2x 6x >12
4 >= x x > 2
now put these inequalities together
4 >= x > 2
this is the answer.
~~~~shreyapril~~~~:
done dude!!!
it was alread solved!!
how was ur dad's b'day party??
Ghost Of Highbury:
--- Quote from: sameer210394 on October 30, 2009, 06:41:00 pm ---
solve both the inequalities separately...
15 - 2x >= 7 5x-2 > 10 - x
15 >= 7 +2x 6x -2 >10
8 >= 2x 6x >12
4 >= x x > 2
now put these inequalities together
4 >= x > 2
this is the answer.
--- End quote ---
the intersection is asked..
so it wud be.. 3,4
By the way..whose b'day party?!?!?
sameer210394:
--- Quote from: A@di on October 31, 2009, 05:44:07 am ---the intersection is asked..
so it wud be.. 3,4
By the way..whose b'day party?!?!?
--- End quote ---
ryt, the intersection can be anything between 4 >= x > 2
it can be 3.2 also, it is not mention whether the numbers is a whole numbers ???
i don't i think the answer should be written in this way...
abbey DAd ka B'Day tha...
Alpha:
--- Quote ---4 >= x > 2
--- End quote ---
Simplified, isn't it x > 2 ???
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