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Can You Solve This Math Question? - Education (9) - Nairaland

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Re: Can You Solve This Math Question? by carlos1(m): 7:00am On Apr 16, 2020
This is the nonsense they wasted my Time teaching me in school. U want to continue from here and. I no dey Sha
Re: Can You Solve This Math Question? by odegood: 7:01am On Apr 16, 2020
The maths has been solved correctly by using almighty formula. Check the 3rd image posted by opperwezen. It is very correct. The is no other way to solve than this method. The very first guy who attempted it miss fired half way. I really hail the guy that solved it the quadratic formula method. U re brilliant
Re: Can You Solve This Math Question? by Footprintz: 7:09am On Apr 16, 2020
After doing this shit in secondary school, man still beg for food in 2020.

After dropping out of school for business in secondary school, man donates billions of naira to people in 2020..

Who this shit help?
Re: Can You Solve This Math Question? by daniwise(m): 7:15am On Apr 16, 2020
OneDollarSalary:

Courtesy: Dejt4u

This is a Jamb question, I've solved some questions severally including this one such that I already know answers off hand.Your answer looks correct though.nice one bro
Re: Can You Solve This Math Question? by suxess18(m): 7:43am On Apr 16, 2020
This is breakdown of the question
But mistakenly used negative sign instead of +8ds

Re: Can You Solve This Math Question? by dejt4u(m): 7:48am On Apr 16, 2020
AnyaIgbo:
Hi everyone, I'm back again to this forum. Sorry, I'm just seeing this now.
Lalasticlala, any prize for it?
Let's start by simplifying
s = [n(2a+(n-1)d]/2
Expand the bracket => s = (2an+dn²—d)/2
Noticed, we have exponent of "n", hence we use Calculus/Differentiation. We use the "Quotient Rule" => ds/dn = [vdu/dn - udv/dn]/V² .
where ds/dn means differentiate "s" under "n".
"u" is the numerator, while "v" is the denominator.
ds/dn = [vdu/dn - udv/dn]/v², solving

ds/dn = [2(2a+2dn-d) - (2an+dn²—d)0]/2²
=> ds/dn = 2(2a+2dn—d)/4
simplifying, we have: s = 2a+2dn—d/2
Then, making "n" subject: 2s = 2a+2dn—d
=> 2dn = 2s—2a+d
Therefore,
n = (2s—2a+d)/2d.

cc: Look at the right answer and how I solved it. Prove me wrong, mrshape dejt4u matex97 pyrex23 stennyb, co...

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That expansion is very wrong.. Check again

2 Likes

Re: Can You Solve This Math Question? by suxess18(m): 7:57am On Apr 16, 2020
This is it

Re: Can You Solve This Math Question? by Nobody: 8:08am On Apr 16, 2020
Mrshape:

Corrected check the fourth post
okay seen

1 Like

Re: Can You Solve This Math Question? by Nobody: 8:30am On Apr 16, 2020
Making n the subject of the formula

2s = 2na+dn-d
2s = n(2a+d)-d
2s+d = n(2a+d)
n = 2s+d/2a+d

1 Like

Re: Can You Solve This Math Question? by lilachiever(m): 9:07am On Apr 16, 2020
OneDollarSalary:

Courtesy: Dejt4u

Thank you Sir
Re: Can You Solve This Math Question? by FuckAllTheMODs: 9:38am On Apr 16, 2020
This starts as arithmetic progression, S is the sum which will lead to quadratic equation.
From there you can use almighty formulae/factorization/completing the square method, depending on the one you can use well.
Re: Can You Solve This Math Question? by kayodez: 9:40am On Apr 16, 2020
So easy to solve .....

Bring on your Mathematics problem let's solve it for you... Contact OKAY TUTORS . cool cool

Re: Can You Solve This Math Question? by Franc5: 10:23am On Apr 16, 2020
I think @fola 2017 is correct and it made more sense that ..
N = 2s + d/2a + d
Re: Can You Solve This Math Question? by CALCULUS16: 10:56am On Apr 16, 2020
n= (1÷2) - (a÷d) +- ( a(a÷d-1)/d + (d+8s)/4d)^1/2
Re: Can You Solve This Math Question? by sheDD(m): 11:06am On Apr 16, 2020
Answers is
n= 2S/2a+(d-d)
Solving
S=[n(2a+(n-1)d]
(Cross multiply)
2s= 2an+(n-1)d
(Multiply d to open d equation)

2s= 2an+(nd-d)
2s=n(2a+(d-d)
(Divide by common factor)
Final answer you isolate n" by dividing both side with 2a+(d-d)

Final answer= n =2s/2a+(d-d)
Re: Can You Solve This Math Question? by Barestic(m): 11:21am On Apr 16, 2020
CoVid19
Re: Can You Solve This Math Question? by Bgcentz(m): 11:27am On Apr 16, 2020
Thunder fire mathematics
Re: Can You Solve This Math Question? by Meomonla: 12:06pm On Apr 16, 2020
This is the correct answer n = [(2a-d)±(4a² - 4ad + d² + 8ds)½] ÷ 2d and not this n = [(d-2a)±(4a² - 4ad + d² + 8ds)½] ÷ 2d . The mistake you guys are making is on this step dn²+2an-dn-2s=0 which is same as dn²+n(2a-d)-2s=0....hey sorry the negative-b from the almighty formula alters the signs where - b= -(2a-d)=d-2a. Hmmm my math is rusty. E don te
Re: Can You Solve This Math Question? by Nobody: 2:04pm On Apr 16, 2020
Come let me house and feed you without maths.
Poverty is in your lineage grin



Vulcan24:


sharap u too like money ... that's y ya poor in brain n pocket
Re: Can You Solve This Math Question? by Vulcan24(m): 4:12pm On Apr 16, 2020
SmilingScorpion:
Come let me house and feed you without maths.
Poverty is in your lineage grin




stale.... the world has moved on from and your tantrums. goodbye medieval man
Re: Can You Solve This Math Question? by Nobody: 7:16pm On Apr 16, 2020
kiss

Just look at a Dummy spit fellow who looks hungry is calling another poor in brain and pocket. Wake up to reality.

tongue

Vulcan24:


stale.... the world has moved on from and your tantrums. goodbye medieval man

Re: Can You Solve This Math Question? by omoplaycool(m): 7:21pm On Apr 16, 2020
pyrex23:


you cant make n subj of formula and it'll be on both sides..
I believe that's where factorization comes in
Re: Can You Solve This Math Question? by PropertyBuying(f): 8:51pm On Apr 16, 2020
dejt4u:
How are you doing oga nla
Re: Can You Solve This Math Question? by Vulcan24(m): 9:06pm On Apr 16, 2020
SmilingScorpion:
kiss

Just look at a Dummy spit fellow who looks hungry is calling another poor in brain and pocket. Wake up to reality.

tongue


lighten up!!! u av spent too much time boxing d air
Re: Can You Solve This Math Question? by Nobody: 11:04am On Apr 17, 2020
Mrshape:
Can Anyone In This Forum kill This?
help me

Re: Can You Solve This Math Question? by Cuterboy(m): 2:02am On May 19, 2020
See more examples here: grin grin grin
http://9jababa.com/how-to-solve-any-quadratic-equation-using-the-almighty-formula
SmilingScorpion:
kiss

Just look at a Dummy spit fellow who looks hungry is calling another poor in brain and pocket. Wake up to reality.

tongue

Re: Can You Solve This Math Question? by Cuterboy(m): 2:04am On May 19, 2020
matex97:
The maths guru, I greet you sir. Good morning

Oya try this one: shocked shocked shocked

http://9jababa.com/how-to-solve-any-quadratic-equation-using-the-almighty-formula
Re: Can You Solve This Math Question? by Cuterboy(m): 2:05am On May 19, 2020
help me

Oya you sef try this one shocked shocked shocked

http://9jababa.com/how-to-solve-any-quadratic-equation-using-the-almighty-formula
Re: Can You Solve This Math Question? by Nobody: 6:33pm On May 26, 2020
Footprintz:
After doing this shit in secondary school, man still beg for food in 2020.

After dropping out of school for business in secondary school, man donates billions of naira to people in 2020..

Who this shit help?
If you only define the worth of something by how much money it adds to your pocket then that's very sad.
Re: Can You Solve This Math Question? by Nobody: 12:36pm On Jan 07, 2021
matex97:
The maths guru, I greet you sir. Good morning
He used the method of completing the square.
Re: Can You Solve This Math Question? by Nobody: 12:41pm On Jan 07, 2021

If you only define the worth of something by how much money it adds to your pocket then that's very sad.

Should a Maths teacher be poor

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