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Mathematics: Post your doubts here!

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assalamualikum, i was wondering if u can help me in the igcse maths 0581...\
4.w08:again the graph for positive values just was weird.q4,(a),b(ii,iii),6(ii),9(is there an easy way to solve venn diagrams>??
 
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Assalamualikum.,
w08:again the graph for positive values just was weird.q4,(a),b(ii,iii),6(ii),9(is there an easy way to solve venn diagrams>??)
 
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Guys I have question in graph X+Y=0 so how da line will look like? will it pass from the center of origin ?
 
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Hi guys
i have a very technical question.
what is an exact value ?

like in the question no.1 , wat should be the answer ?
is it 4.50 x 10^9 or 4.496 x 10^9
i checked the marking scheme , it says its 4.496 x 10^9 but shuldnt we round this off to 3s.f ???
 

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