-->
I need help on question no. 2 Oct/Nov 2009 pure math 3
Revolution Now!
Welcome,
Guest
. Please
login
or
register
.
Have you missed your
activation email
?
1 Hour
1 Day
1 Week
1 Month
Forever
Login with username, password and session length.
News:
New servers, hooraaaay! More bandwidth, more power.
-->
Home
Help
Calendar
Login
Register
IGCSE/GCSE/O & A Level/IB/University Student Forum
»
Qualification
»
GCE AS & A2 Level
»
Subject Doubts
»
Math
»
I need help on question no. 2 Oct/Nov 2009 pure math 3
« previous
next »
Print
Pages: [
1
]
Go Down
Author
Topic: I need help on question no. 2 Oct/Nov 2009 pure math 3 (Read 1100 times)
osmosis
Newbie
Posts: 49
Reputation: 56
I need help on question no. 2 Oct/Nov 2009 pure math 3
«
on:
February 18, 2010, 03:14:56 pm »
can anyone help me how to find the two consecutive integers for question no.2 OCT/NOV 2009 pure math 3 paper???
Logged
osmosis
Newbie
Posts: 49
Reputation: 56
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #1 on:
February 18, 2010, 03:49:23 pm »
do we need to just substitute any integer??? or is there any other way to get x=3 and x=4???
Logged
astarmathsandphysics
SF Overlord
Posts: 11271
Reputation: 65534
Gender:
Free the exam papers!
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #2 on:
February 19, 2010, 12:16:36 am »
Will answer when I get up
Logged
astarmathsandphysics
SF Overlord
Posts: 11271
Reputation: 65534
Gender:
Free the exam papers!
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #3 on:
February 19, 2010, 08:54:43 am »
3^(x+2)=3^x+3^2
3^(x+2)-3^x=3^2
3^x(3^2-1)=3^2
3^x=3^2/(3^2-1)
xln3=ln(3^2/(3^2-1))
x=ln(3^2/(3^2-1)))/ln3
Logged
osmosis
Newbie
Posts: 49
Reputation: 56
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #4 on:
February 19, 2010, 12:35:21 pm »
owh...that is for paper 31.... mine is paper 32....about finding the two consecutive integers on numerical solution topic.....that's where I got problem in finding the integer...can you help me with that one?
Logged
astarmathsandphysics
SF Overlord
Posts: 11271
Reputation: 65534
Gender:
Free the exam papers!
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #5 on:
February 19, 2010, 12:43:35 pm »
How did I miss that? When I get home.
Logged
astarmathsandphysics
SF Overlord
Posts: 11271
Reputation: 65534
Gender:
Free the exam papers!
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #6 on:
February 19, 2010, 05:44:05 pm »
Trial and error. The root is between 3 an 4
f(3)<0 f(4)>0
so between 3 and 4 there is a sign change and a root.
Logged
osmosis
Newbie
Posts: 49
Reputation: 56
Re: I need help on question no. 2 Oct/Nov 2009 pure math 3
«
Reply #7 on:
February 19, 2010, 10:47:16 pm »
ok....thank you so much!
Logged
Print
Pages: [
1
]
Go Up
« previous
next »
IGCSE/GCSE/O & A Level/IB/University Student Forum
»
Qualification
»
GCE AS & A2 Level
»
Subject Doubts
»
Math
»
I need help on question no. 2 Oct/Nov 2009 pure math 3
\n\t\t\t\t\t\t\t\t\t
<' + '/div>\n\t\t\t\t\t\t\t\t\t
%body%<' + '/textarea>
\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t\t
\n\t\t\t\t\t\t\t\t\t<' + '/div>\n\t\t\t\t\t\t\t\t<' + '/div>', sTemplateSubjectEdit: '
', sTemplateBodyNormal: '%body%', sTemplateSubjectNormal: '
%subject%<' + '/a>', sTemplateTopSubject: 'Topic: %subject% (Read 1100 times)', sErrorBorderStyle: '1px solid red' }); aJumpTo[aJumpTo.length] = new JumpTo({ sContainerId: "display_jump_to", sJumpToTemplate: "
Jump to:<" + "/label> %dropdown_list%", iCurBoardId: 146, iCurBoardChildLevel: 2, sCurBoardName: "Math", sBoardChildLevelIndicator: "==", sBoardPrefix: "=> ", sCatSeparator: "-----------------------------", sCatPrefix: "", sGoButtonLabel: "Go" }); aIconLists[aIconLists.length] = new IconList({ sBackReference: "aIconLists[" + aIconLists.length + "]", sIconIdPrefix: "msg_icon_", sScriptUrl: smf_scripturl, bShowModify: true, iBoardId: 146, iTopicId: 6004, sSessionId: "8a123bbdb47cd7b067b7c3e2828da857", sSessionVar: "aaed8ba03", sLabelIconList: "Message Icon", sBoxBackground: "transparent", sBoxBackgroundHover: "#ffffff", iBoxBorderWidthHover: 1, sBoxBorderColorHover: "#adadad" , sContainerBackground: "#ffffff", sContainerBorder: "1px solid #adadad", sItemBorder: "1px solid #ffffff", sItemBorderHover: "1px dotted gray", sItemBackground: "transparent", sItemBackgroundHover: "#e0e0f0" }); } // ]]>--> -->