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Mathematics: Post your doubts here!

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Please help with and 9(ii) & 10(i)

In question 9, after you integrate you are left with:
(2A – 5)0.5 - kt = c

when you find the square root of what is inside the bracket, is it not :
±3 ? if so why does the marking scheme only use the value +3????

Thanks
 

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That is correct, I teach A level H2 maths. Have a good day too. Peace.
Hello sir for iteration!!a doubt in my mind!!
Do we take the initial value as average suppose if the root lies between 1
6<x<9 then do we do (6+9)/2 and take 7.5 as initial value or just take 6 the starting value as initial value !!!
plz its uregent and many of my friends also have this doubt plz help sir
 
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can someone please solve part (b)? whitecorp i really need help

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also can u do part (iii) of this question? and draw the argand diagram? please?
 
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For Q10, I will require the answers from (i) and (ii) (a).

Here are the solutions for Q7 (complex numbers Argand Diagram):



Hope this helps. Peace.

thankyou..tht helped me sooooo much! u r awsome!!!
and here is the mark scheme for the other question!
 

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