2 unit maths revision (1 Viewer)

[SpiralFlex]

Substitute into original equation, to get .

Therefore the point of inflexion is

 

[hello9]

A circuit consists of a voltage source ( with a value of Vs ), and a single resistor, called the “Thevenin resistance” ( with a value of Rth ). A load resistor ( of any value, say RL ) is then connected in series with the circuit.
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It can be shown that the current through this load resistor is I= [Vs] / [RL + Rth]
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It is also given that the power absorbed in a resistor is given by P = I^2 x R, where I is the current through the resistor and R is the resistance of the resistor.
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Find a condition on the values of Vs, Rth and RL to have maxium power absorbed in the load resistance.
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Yay for electrical engineering
'
ignored all the weird things like this >>>>

nothing has been left out

 

[hscishard]

A circuit consists of a voltage source ( with a value of Vs ), and a single resistor, called the “Thevenin resistance” ( with a value of Rth ). A load resistor ( of any value, say RL ) is then connected in series with the circuit.
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It can be shown that the current through this load resistor is I= [Vs] / [RL + Rth]
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It is also given that the power absorbed in a resistor is given by P = I^2 x R, where I is the current through the resistor and R is the resistance of the resistor.
<O></O>
Find a condition on the values of Vs, Rth and RL to have maxium power absorbed in the load resistance.
<O></O>
Yay for electrical engineering
'
ignored all the weird things like this >>>>

nothing has been left out

wtf uni physics?
It doesn't sound very hard for some reason...

 

[hscishard]

I was surprised to find several questions of similar type in a book "Algebra Visually" ?? recently @ West Ryde Library including: Solve and the given answer was: .

But you know this inequality is true for all real x.

As for: if you solve the usual way you get

But this is nonsense since no x can satisfy this equation.

Lmao yea

 

[Existential]

what topics are ppl up to in (2U) class? mine is one topic behind and we are just starting trig. functions :/

 

[Riproot]

what topics are ppl up to in (2U) class? mine is one topic behind and we are just starting trig. functions :/

Just finished that, doing inverse functions now. Which is mx1, but my 2u and mx1 class is the same.

 

[AAEldar]

what topics are ppl up to in (2U) class? mine is one topic behind and we are just starting trig. functions :/

Just started Integration, but I've already done it so it's kinda slow :\

 

[OmmU]

Just finished integration today. Up to exponential and log functions.

 

[rawrence]

what topics are ppl up to in (2U) class? mine is one topic behind and we are just starting trig. functions :/

The 2unit course at my school is up to geometrical applications of physical worlds (rates of change, growth and decay)

 

[Existential]

after trig functions, i still have to do logs and exponents, motion and series - then im done the 2u course.* and u?

*note im talking about what the class is up to, not what you're up to by yourself.

 

[deterministic]

new question:
differentiate xln(x)
hence integrate ln(x)

 

[UnrealAnchovies]

new question:
differentiate xln(x)
hence integrate ln(x)

1 + lnx for first.

xlnx - 1 for second.

 

[mitchy_boy]

How long's a piece of string?

 

[Absolutezero]

How long's a piece of string?

x of undefined units.

 

[UnrealAnchovies]

How long's a piece of string?

horse radish

 

[mitchy_boy]

Twice the distance from the centre.

 

[UnrealAnchovies]

Please don't tell me you saw my fail Latex earlier lol.

 

[SpiralFlex]

New question ladies and gentlemen.

 

[mitchy_boy]

x=2

Give them something harder.

 

[mitchy_boy]

A fish farmer began business on 1 January 1998 with a stock of 100 000 fish. He
had a contract to supply 15 400 fish at a price of $10 per fish to a retailer in
December each year. In the period between January and the harvest in December
each year, the number of fish increases by 10%.

(i) Find the number of fish just after the second harvest in December 1999.

(ii) Show that, the number of fish just after the n th harvest, is given by

(iii) When will the farmer have sold all his fish, and what will his total
income be?

(iv) Each December the retailer offers to buy the farmer’s business by paying
$15 per fish for his entire stock. When should the farmer sell to
maximise his total income?