# kwa wale wa mathematics!,

Discussion in 'Jukwaa la Elimu (Education Forum)' started by mnoel, Sep 13, 2012.

1. ### mnoelSenior Member

#1
Sep 13, 2012
Joined: Aug 14, 2012
Messages: 133
Likes Received: 18
Trophy Points: 35
solve for x,,
2logx=x/25
njia muhimu wakubwa!

2. m

### mwanamabadilikoJF-Expert Member

#2
Sep 13, 2012
Joined: Oct 30, 2010
Messages: 285
Likes Received: 25
Trophy Points: 35
[QUOTE=mnoel;461877. Jibu ni 100 , hili swali halina njia. Am from UDSM- College of engineering

3. f

### fortunhoSenior Member

#3
Sep 13, 2012
Joined: Aug 15, 2012
Messages: 107
Likes Received: 5
Trophy Points: 35

4. m

### mwanamabadilikoJF-Expert Member

#4
Sep 13, 2012
Joined: Oct 30, 2010
Messages: 285
Likes Received: 25
Trophy Points: 35
OLNS[/QUOTE]. Hongera na karibu coet. Ila coet ukija hiz njia zako feki tupa kule. Swali halina njia .am 4th yr coet

5. ### NullPointerJF-Expert Member

#5
Sep 13, 2012
Joined: Feb 7, 2011
Messages: 3,483
Likes Received: 609
Trophy Points: 280
Jibu ni 100 ila kwa njia ya Trial&Error... Chora table, row ya kwanza 2logx, table ya pili x/25 then kwenye column anza kutumia akili ya kuzaliwa unajaza numbers hadi upate same soln... kwa sasa sina njia nyingine..... Mzumbe High School PCM

6. ### wijeiJF-Expert Member

#6
Sep 13, 2012
Joined: Jun 11, 2011
Messages: 462
Likes Received: 21
Trophy Points: 35
. Hongera na karibu coet. Ila coet ukija hiz njia zako feki tupa kule. Swali halina njia .am 4th yr coet[/QUOTE]

dogo hizo MT ulizosoma hapo coet ndo unaona umesoma kila kitu.course zenyewe sijui kama zinazidi nne halafu ni MT for non major.sijui kama umesoma course ya analysis hata moja dio maana unasema hivi.

7. ### SharkJF-Expert Member

#7
Sep 13, 2012
Joined: Jan 25, 2010
Messages: 15,696
Likes Received: 1,832
Trophy Points: 280
I'll be back!!!

8. ### QUALIFIEDJF-Expert Member

#8
Sep 14, 2012
Joined: Jun 13, 2012
Messages: 714
Likes Received: 43
Trophy Points: 45

9. ### NingaRJF-Expert Member

#9
Sep 14, 2012
Joined: Apr 15, 2012
Messages: 2,827
Likes Received: 8
Trophy Points: 135
katumia"Trial and Error" Method
teh! teh! teh!

10. f

### fortunhoSenior Member

#10
Sep 14, 2012
Joined: Aug 15, 2012
Messages: 107
Likes Received: 5
Trophy Points: 35
dogo hizo MT ulizosoma hapo coet ndo unaona umesoma kila kitu.course zenyewe sijui kama zinazidi nne halafu ni MT for non major.sijui kama umesoma course ya analysis hata moja dio maana unasema hivi.[/QUOTE]

you have 2 b srous

11. ### Mbwiga88JF-Expert Member

#11
Sep 14, 2012
Joined: Jul 9, 2012
Messages: 639
Likes Received: 1
Trophy Points: 35
hiyo ni differential eqn,...Ilboru 4m 6 PCM

12. ### mnoelSenior Member

#12
Sep 14, 2012
Joined: Aug 14, 2012
Messages: 133
Likes Received: 18
Trophy Points: 35
swali lolote lenye jibu lina njia wakubwa!!
Chemsheni ubongo!!

13. ### Good GuyJF-Expert Member

#13
Sep 14, 2012
Joined: Oct 24, 2010
Messages: 4,451
Likes Received: 26
Trophy Points: 145
wewe acha kuotea vitu na kudanganya umma! Unaweza nambia order ya hiyo eqn if its wat you say it is?

14. l

### lugano5JF-Expert Member

#14
Sep 14, 2012
Joined: Jul 15, 2010
Messages: 4,342
Likes Received: 5
Trophy Points: 5
hilo swali balaa nilienda shule fulani kupiga tempo nikapewa na madogo ila nilifoji njia ikaja 100.....kwani niliona nitadhalilika hapa mjini na ukizingatia nimepga pcm alaf nasoma eng..........

15. K

### King Kalu GMember

#15
Sep 14, 2012
Joined: Aug 23, 2012
Messages: 12
Likes Received: 0
Trophy Points: 0
un42natry we dont know x so we cant solve 4 him

16. ### SharkJF-Expert Member

#16
Sep 14, 2012
Joined: Jan 25, 2010
Messages: 15,696
Likes Received: 1,832
Trophy Points: 280
I am back now!!

2Logx = x/25

Divide by x both sides
(2/X)logx = 1/25

logx [SUP](2/x)[/SUP] = 1/25

Remove log sign
10[SUP](1/25) [/SUP]= x[SUP](2/x)

[/SUP]Take &#8730; both sides(but &#8730; means power 1/2)
so, from &#8730;10[SUP](1/25) [/SUP]=&#8730;x [SUP](2/x)[/SUP]

we will get
10[SUP]1/25(1/2)[/SUP] = x[SUP]2/x(1/2)

[/SUP]simplify on exponents
10[SUP]1/50[/SUP] =x[SUP]1/x

[/SUP]10[SUP]2/2*1/50[/SUP] =x[SUP]1/x[/SUP] note 2/2=1, so will not change the value of exponent
10[SUP]2(1/100)[/SUP] =x[SUP]1/x

[/SUP]100[SUP]1/100[/SUP] = x [SUP]1/x[/SUP]

x = 100
O-Level, Azania '96 - '99

17. ### JOAQUEMJF-Expert Member

#17
Sep 14, 2012
Joined: Jul 28, 2012
Messages: 778
Likes Received: 126
Trophy Points: 60
Good nimekubali

18. ### ndetichiaJF-Expert Member

#18
Sep 14, 2012
Joined: Mar 18, 2011
Messages: 27,534
Likes Received: 120
Trophy Points: 160
mmmmmhhhhh hiyo lugha jf kazi ipo kwa mamod

19. ### SharkJF-Expert Member

#19
Sep 14, 2012
Joined: Jan 25, 2010
Messages: 15,696
Likes Received: 1,832
Trophy Points: 280
Aminia mkuu,
Ulivyosema you will be back nlifikiri umeingia mitini!!

20. ### ndetichiaJF-Expert Member

#20
Sep 14, 2012
Joined: Mar 18, 2011
Messages: 27,534
Likes Received: 120
Trophy Points: 160
mboni inaonekana kama copy and paste hiyo mzee hasa kuanzia hapo kwenye bluu