₦airaland Forum

ogunsinamayowa:
The situation when you refresh your gmail account every second in anticipation for UI hall approval mail. Viola! New mail popped up! No doubt in your mind; your mind said and confirmed it as the hall approval mail. The anticipation grew intensively and your anxiety became abnormal. You are praying from one small corner of your mind. Firing and swearing the devil of negative mail with blood of Jesus and in veracity of Mountain of fire devil-crushing prayer.

You finally evoked the courage and check the message. but the subject of the message was ' Effective Penis Enlargement Medicine' from Mr Emeka Chukuma.

lol

lurlay:
what time did you apply

Around 8am

Geofavor:
thank you sir. It's hightime I burnt this nonsense past questions book.

Or is there any chance that the answer is 2! X 6!?

Depends on the condition. But by default(without condition), 6!/2! Is the correct solution. It's just like saying. In how many ways can the letters of the word "SCHOOL" be arranged?

You guys can start checking your mail oh, my hostel application has been approved

Geofavor:
In how many ways can 6 coloured chalks be arranged if 2 are of the same colour?

A) 60. B) 120. C)240. D)360

6!/2! = 360

ShyNeptune:
Cool.




Is that you in your DP?

Yah

Bhuumhite:
same here,incorrect password o....

Try using another browser, preferably the default web browser or clear the cache/cookies of the one you've been using

Geofavor:
Shouldn't this be 5C₂ x 3C₁ + 5C₁ x 3C₂ ?

Yah, you're correct. It's either 2 men and one woman or 2 women and one man

PrinceCEE:
A tab


I finally resolved it bro. I used another app(hancom pdf viewer) to view it.

Kul

PrinceCEE:
I've applied for a room but my printout brought that of another person that also picked my hall but a different block. I later reversed the registration and wanted to print but it's showing file format not supported in my device.

What could be the problem

Did you use a phone?

itsurgirlella:
I have logged in and a message that my room is being processed has bin sent.

I think the place logged in to is the portal where you were able to apply successfully for halls and I guess people have no problem with that. It's the student mail that's giving people stress.

Youngzedd:
Download speed have to do with your network provider.

with the same network provider and same location, I get better speeds on other phones.

Geofavor:
I don't understand o. I thought in a football game, we can have a total of three outcomes: win, draw, lose.

:. The probability of a draw should be 1/3. But this isn't the answer

The probability that the game ends in a draw = P(P draws the game) AND P(Q draws the game)
My thoughts

The 2 problems I have with this phone is the ram management and download speed. Not impressive at all

Actually, I think you guys have been looking at the question from a wrong angle. Something tells me that he meant (1/2)x or x/2 and (1/3)x or x/3 instead of the 1/2x and 1/3x respectively in the question.
My thoughts though

Geofavor:
I understand. Hmm.

Let me form a question and solve.

If y = -3xcosx find dy/dx

dy/dx = -3x(-sinx) + -3(cosx)

= 3xsinx - 3cosx

lemme verify. Y = -3xcosx

v = -3x, u = cosx,

-3x(-sinx) + cosx(-3)

= 3xsinx -3cosx

alright.

I wish you and mathfaro excellence as you resume. But don't leave us yet o. Lol. This is when we need you most, as the exam is just a month away.

I'm gonna be needing tips on how to answer some questions fast (in seconds). Especially in physics and maths.

Thanks.

I almost didn't get the mention. You've omitted the "e" on my handle

AOIF:
You Can Now Check Your School Fees Schedule, Irrespective Of Courses

This is very true o

I've not been able to log in after following the laid down steps

Edit
I'm so sorry for doubting the Intel

thankyouJesus:
Since we dey same hostel, we go jam for school na.
Have a wonderful day sir.

you too bro

Another example here;
Note that the 1/3 in the first line of solution is the reciprocal of the differentiation of 3x - 5 (which is 3) and the 5 in the denominator is the same as the power got by increasing the initial power(4) by 1 (4 + 1)

thankyouJesus:
Algebraic substitution method will work.
Let u=2x+1.
Find du/dx = 2.
Dx=du/2.
Substitute back into the integral and evaluate.
CcI sight you bro.

my Oga I remain loyal o

Good morning guys

Geofavor:
okay. The confusion i'm having is the set notation. It's been long

P(PUQ) = probability of P or Q as requested for in the question
P(PnQ) = probability of both P and Q = 1/12
P(P)= probability of P = 3/4
P(Q) = probability of Q = 1/6
And since P and Q are not mutually exclusive, the probability of P or Q, P(PUQ)=P(P)+P(Q)-P(PnQ)
The ball is now in your court...

Another example,
Given y = 2tan5x,
dy/dx is simply = 2 * 5sec²5x
= 10sec²5x.

But if we have something like y = xsinx, this time around, we must use product rule since x is a function of x multiplied by another function of x, sinx. So u = x and v = sin x and so on....

Geofavor:
I think you'll use product and chain rule.

Product rule
V.du/dx + U.dv/dx

u = 3, v =sin(-4x)

du/dx = 0, dv/dx =? Using chain rule: let a = -4x

:. V = sina

chain rule states, dv/dx = dv/da * da/dx

dv/da = cosa, da/dx = -4

:. dv/dx = cosa * -4 = -4cosa

back to product rule which states:

dy/dx = V.du/dx + U.dv/dx

v = sin(-4x), u =3, du/dx = 0, dv/dx = -4cosa

therefore, dy/dx = sin(-4x) * 0 + 3 * -4cosa

-12cosa. Recall that a = -4x

dy/dx = -12cos(-4x)...


Abeg who knows a quicker method?

The 3 is a constant and not a function of x so you can't represent it with "u" neither should you use product rule. The traditional way of doing this is using the chain rule as shyneptune did. But as jamb candidates theres a shorter alternative.
We all know that if y = sinx, dy/dx = cos x
If y = tanx, dy/dx = sec²x and
If y = cos x, dy/dx = -sinx,
Fine, what if we have y = sin(ax),
To differentiate y, we differentiate ax (which is a) and multiply it by the differentiation of "sin" function which is "Cos". I.e
If y = sin(ax), dy/dx = cos(ax)

E.g., if y = Cos(3x² - 2), find dy/dx
Firstly, we find the differentiation of 3x² - 2 (which is 6x) and then we multiply it by the derivative of the "cos" function which is "-sin". Therefore,
dy/dx = 6x * (-sin)(3x² - 2)
= -6xsin(3x² - 2).

Then finally, back to the question in quote,
If y = b cos(ax), to find y´, we consider the b as just a constant (since we're differentiating with respect to x and b doesn't contain x) that will be multiplied by our answer after solving.
I.e., if y = b cos(ax),
dy/dx = b * -asin(ax) = -absin(ax)

So if y = 3 sin(-4x),
First and foremost, remember that 3 is just a constant, and that the differentiation of (-4x) is -4, then following the steps I earlier stated, the differentiation of sin(-4x) = -4cos(-4x) (remember that the differentiation of sinx function is Cosx).
Therefore, dy/dx = 3 * (-4cos(-4x))
= -12cos(-4x)

[quote author=ShyNeptune post=42466557][/quote]This is lovely. Which app did you use?

alphabbey1:
I was also given Mellanby. When I went to check the hall on tuesday, It was extra neat and beautiful.... Have even secure a room from the hall warden....

Nice one

1. Gas prepared by the rxn btwn methanoic acid and conc H2SO4 is?
A. SO2
B. CO
C. CO2
D. H2S

2. A heating coil rated 1000W is used to boil off completely 2kg of boiling water. The time required to boil off the water is
A. 1.15*10⁴s
B. 1.15*10³s
C. 4.6*10⁴s
D. 4.6*10³s
(Specific Latent heat of vaporization of water= 2.3*10^6 Jkg-¹)

3. If the pressure of the vapour on top of an enclosed liquid is equal to the atmospheric pressure,what will be the temperature of the liquid enclosed?
A. Room temperature
B. Boiling point
C. Freezing point
D. Standard temperature

4. An object of mass 80kg is pulled on q horizontal rough ground by a force of 500N. Find the coefficient of static friction. A. 0.8
B. 0.4
C. 1.0
D. 0.6
(g=10ms-²)

5. A car accelerates uniformly from rest at 4ms-². How far will it travel in the fifth complete second? A. 100m
B. 50m
C. 32m
D. 18m

6. If a light wave has a wavelength of 500mm in air,what is the frequency of the wave?
A. 3.0*10¹⁴Hz
B. 6.0*10^8 Hz
C. 6.0*10^5Hz
D. 2.5*10¹⁴Hz
(c= 3*10^8ms-¹)

7. The ability of the human eye to focus objects on the retina is referred to as the power of
A. Interference
B. Diffraction
C. Accommodation
D. Superposition

8. Thermionic emission is the process whereby
A. Beta rays are produced
B. Holes are produced
C. X-rays are produced
D. Electrons leave a hot element

9. If the refractive index of crown glass is 1.51,its critical angle is
A. 48.6°
B. 22.5°
C. 41.5°
D. 45.0°

10. A bullet fired vertically upward from a gun held 2.0m above the ground reaches its maximum height in 4s. Calculate its initial velocity
A. 10ms-¹
B. 8ms-¹
C. 40ms-¹
D. 20ms-¹
(g=10ms-²)

horlanchilae:
[color=#000099][/color]
Good mawin every1. Plz do we av any mathematics student here?

presentsir

Bhuumhite:
mathefaro...what hall were u given?

Mellanby

PrinceCEE:
I believe that by Monday, the portal will be open for hall application and subsequent payment...

Same thought here

PrinceCEE:
Biggy, I jump out of aeroplane just to greet u

If I had told u that u will be given the hall where we met for the first time, would u've believed?

Not at all.. I wasnt expecting any particular hall though