Top answers

What is the Hardy-Weiberg principle? How do I use the calculations? What are the limitations?

The Hardy-Weinberg principle is used in population genetics. Population genetics is the study of allele frequencies in populations and how they change over time. There are 2 equation used in the Hardy-Weinbe...
JL
Answered by Jessica L. • Biology tutor
3780 Views

Why was the Maastricht treaty so hard to pass?

For lots of people, the Maastricht treaty was the first real step into the concrete future of the European Union. The Maastricht treaty represented obligations and responsibilities for EU member states and t...
LJ
Answered by Louis J. • History tutor
2802 Views

How do I answer a 'to what extent' question?

You need to do two things here. Firstly, you need to have a clear opinion and argument. The reader should get to the end of your essay and know what it is YOU think in how far the statement stands. Think of ...
AG
Answered by Anna G. • History tutor
17325 Views

Use the substitution u = cos 2x to find ∫(cos^2*(2x) *sin3 (2x)) dx

∫(cos 2 2x *sin 3 2x)dx u = cos2x - u =(du/dx) = -2sin2x - differentiate u dx = du/(-2sin(2x)) - dx = -1/2 ∫cos 2 2x * sin 2 2x du - sub in dx-1/2 ∫u 2 (1-u 2 )du - put in terms if u -1/2 [ u 3 /3 - u 5 /5 ]...
WB
Answered by Will B. • Maths tutor
8344 Views

Does the equation x^2 + 2x + 5 = 0 have any real roots?

This equation has no real roots, as when we test the equation with the formula b 2 - 4ac, we get 2 2 -4 1 5 = 4 - 20 = -16. As this is negative we can be assured that this equation has no real roots.
SB
Answered by Sami B. • Maths tutor
5922 Views