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Evaluate the integral ∫2x√(x^2 +1) dx

The first step is deciding on the method of integration. For this integral it makes the most sense to use substitution.Let u = x 2 + 1Differentiate w.r.t x => du/dx = 2xRearrange for dx=> du/2x = dx Su...
SC
Answered by Sam C. Maths tutor
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How do I start writing a personal statement?

Your personal statement should give the reader an idea of your experiences and motivations and how these have shaped you and, finally, how the course you are applying for will bring forth that which is withi...
TD
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Evaluate the following : ∫ln(x) dx

Integrate by parts:u = ln(x) u' = 1/x v' = 1 v = xBy parts formula: uv - ∫u'v dx Therefore we have: x ln(x) - ∫x 1/x dx = x ln(x) - ∫1 dx = x ln(x) - x (+c)
SM
Answered by Saaqib M. Maths tutor
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Which of the following are magnetic materials? Copper, Cobalt, Carbon, Nickel

Cobalt and Nickel
EM
Answered by Elizabeth M. Physics tutor
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Find x in the following equation: 4x + 8 -2x = 10

First combine the x-parts of the equation: 4x - 2x = 2x Next move the "number parts" so they are all on the same side: 2x + 8 = 10 ---> 2x = 2 Then divide through by 2 to move the 2 from the 2x ...
EM
Answered by Elizabeth M. Maths tutor
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