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Given that dx/dt = (1+2x)*4e^(-2t) and x = 1/2 when t = 0, show that ln[2/(1+2x)] = 8[1 - e^(-2t)]

1/(1+2x) dx = 4e^(-2t) dt      Integrate both sides:   ln[2/(1+2x)] = -8e^(-2t) + c      input x = 1/2, t = 0:  ln(2/2) = -8*(1) + c        ln 1 = 0,  so c = 8ln[2/1+2x] = 8[1-e^(-2t)]

HF
Answered by Henry F. Maths tutor
3316 Views

Solve: 2 sin(2x) = (1-sin(x))cos(x) for 0<x<2*Pi and give any values of x, if any, where the equation is not valid

Double angle formula:Sin(2x) = 2sin(x)*cos(x)==> 2sin(x)*cos(x) = (1-sin(x))*cos(x)       (2sin(x)-1+sin(x))*cos(x) = 0(3sin(x) - 1)*cos(x) = 0     i) cos(x) = 0,  ii) 3sin(x) = 1 ==> sin(x) = 1/3  ...

HF
Answered by Henry F. Maths tutor
5127 Views

How can I get above 40 in my literature and film essays?

Getting above 40 at first can seem like a difficult task, but is more than possible. Regarding a literature response, if possible short and simple quoting can be helpful however not vital. A simple quote ...

DO
Answered by Dea O. Spanish tutor
2321 Views

Explain the concept of supervenience

Supervenience is the relationship between two different kinds of facts (or properties) such that A type supervenes on B type if and only if there cannot be a change in A without a change in B. To illustra...

EM
Answered by Ethan M. Philosophy tutor
4765 Views

'Love is the key motivator for Othello's interactions with Desdemona.' To what extent do you agree?

After having read Shakespeare's 'Othello' it becomes apparent that love is an extremely predominant theme. Where the eponymous character (Othello) and his wife (Desdemona) are concerned, the notion of lov...

GW
Answered by Georgia W. English tutor
5768 Views

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