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Solve the differential equation csc(x)*dy/dx=exp(-y), given that y(0)=0. (Typical Math HL paper 3 question, Calculus optional topic)

Firstly, we need to grasp the problem, and understand what the question is asking us to do. We are given a differential equation, and we are required to solve for y, i.e. write y as a function of x: y(x)=......
KG
Answered by Khariton G. • Maths tutor
2125 Views

What is the best way to revise for a speaking exam?

In terms of speaking exams, the most cliché answer is practice, practice and practice! The advice that used to help me a lot when revising for a speaking exam is to record yourself speaking and then listenin...
HO
Answered by Hazel O. • German tutor
3450 Views

In a population of 1000 lemmings there are two alleles for skin colour, the dominant colour being cream (C) and the recessive being white (c). 350 individuals have white skin. Use Hardy-Weinberg to predict the number of homozygous recessive individuals.

Hardy-Weinberg Principle states that in a population of randomly mating individuals: p + q = 1 p 2 +2pq+q 2 =1 White fur = homozygous recessive = q 2 = 350/100 = 0.35 Therefore q = sqrt(0.35)=0.59 (2sf)p = 1...
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Answered by Igbunu O. • Biology tutor
2820 Views

To what extent was pre-war Nazi social policy a success?

The student should address:The demonization of Germany's Jewish population - the Nuremburg Laws, Boycotts of Jewish owned businesses and Kristallnacht in particular. As well as the effectiveness of propagand...
AM
Answered by Alexander M. • History tutor
3374 Views

translate the following - "Si no limpiamos nuestros mares vamos a tener problemas ecológicos con la basura en el futuro"

"If we do not clean our seas we will have many ecological problems with waste in the future" - the student will build on their topical vocabulary with any missing vocabulary or gramatical errors be...
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Answered by Alexander M. • Spanish tutor
2279 Views