Find the value of x | JamiiForums | The Home of Great Thinkers

Find the value of x

Discussion in 'Jukwaa la Elimu (Education Forum)' started by Mutta, Apr 29, 2012.

1. MuttaSenior Member

#1
Apr 29, 2012
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2^x = 4x( 2 power x is equal to 4x).Show your working clearly.Any one who can solve it help me.

2. PretaJF-Expert Member

#2
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wapi Kongosho.......mi mgeni sana hapa.....

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3. KangJF-Expert Member

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4. KitukoJF-Expert Member

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1) Apply log ya base 10:
log2^x=log4x
xlog2=log4+logX
xlog2=log(4+x)
x=log(4+x)/log2
x=(4+x)/2
2x=4+x
x=4

5. by defaultJF-Expert Member

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big up mkuu

6. ChakunyumaJF-Expert Member

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Hapana mkuu cheki vizuri kwenye blue!Ipo hivi
2[SUP]x[/SUP]=4x
Apply log base ten
log(2[SUP]x[/SUP])=log(4x)
xlog2=log4 +logx
xlog2=log(2[SUP]2[/SUP]) +logx
xlog2=2log2 +logx
xlog2-2log2 =logx
(x-2)log2 =logx
x-2=logx/log2
x-2= x/2
2x-4 =x
2x-x =4
x=4
Umegundua kosa la kikanuni hapo?

7. NingaRJF-Expert Member

#7
Apr 29, 2012
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OYA logx/log2 ni logx base2 sio logx/2

8. DASAJF-Expert Member

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9. simplemindJF-Expert Member

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Problem has no exact solution. Can be solved graphically or by numerical methods.

Graphic solution:

Draw curve y=2^x and the line y= -4x . Point of intersection of curve and line is the required solution. (lies between x=-1 and x=0)

10. KangJF-Expert Member

#10
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Hauwezi ku cancel logarithms kihivyo.

11. DASAJF-Expert Member

#11
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Ongezea na hii 3[SUP]X[/SUP]=9X

12. King Kong IIIJF-Expert Member

#12
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Haa mnanikumbusha mabanda yangu ya number.

13. HusninyoJF-Expert Member

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DASA naona hesabu yako imejirudia.

14. MbimbinhoJF-Expert Member

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DASA kutumia desa haimo mkuu..:nono:

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15. deoganJF-Expert Member

#15
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Hapa naona tu kanuni mpya za log!

16. Msafiri KasianJF-Expert Member

#16
Apr 29, 2012
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Dah! Jamani eeh! Mbona Kang ameshaelezea namna ya kutumia graph kusolve hyo hesabu? Log concept haipandi hapo jamani,mnaotumia log hapo ni Uongo unaofanana na Ukweli. Tumieni graph acheni uvivu watanzania,haya mabishano tunayoyaendeleza hapa,tulishabishana sana tukiwa shule,sasa tuuelewe ukweli tufanye kazi ya kuboresha maisha yetu.

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17. Msafiri KasianJF-Expert Member

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Bg up kaka! Waambie hao,mi nilishaelewa tangu zamani,lakini humu watu hawataki kubadilika.

18. Msafiri KasianJF-Expert Member

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Bg up kaka Kang! Waambie hao,mi nilishaelewa tangu zamani,lakini humu watu hawataki kubadilika.

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19. DASAJF-Expert Member

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