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How do I answer a long answer question in detail without writing too much and wasting exam time?

Use key words and ensure you are specific in what you are saying. Try and avoid writing in long sentences, use bullet points if you can. Diagrams are also helpful for the examiner to understand your answer b...
OO
3571 Views

Describe the structure of DNA

Nucleotides make up DNA. Nucleotides themselves are made up of a phosphate, sugar and base. They bases are: Adenine (A), Thymine (T), Cytosine (C), Guanosine (G). A is bonded to T. C is bonded to G. The base...
ML
Answered by Miranda L. • Biology tutor
3200 Views

Using the substitution u = ln(x), find the general solution of the differential equation y = x^2*(d^2(y)/dx^2) + x(dy/dx) + y = 0

dy/dx = (dy/du) (1/x), d^2(y)/dx^2 = (d^2(y)/du^2) (1/(x^2)) - (dy/du)*(1/(x^2)) (x^2) ( (d^2(y)/du^2) (1/(x^2)) - (dy/du) (1/(x^2)) ) + x (dy/du)*(1/x) + y = 0 d^2(y)/du^2 - dy/du + dy/du + y = 0 d^2(y)/du^...
IK
5379 Views

Solve (x+2)/3x + (x-2)/2x = 3

In order to solve this equation we need to rearrange it to have all of the variables on one side of the equals sign and the constants on the other. We do this by multiplying each term by the denominator of o...
AY
Answered by Annabel Y. • Maths tutor
20123 Views

How do I solve simultaneous equations?

A easy way to solve simultaneous equations is to substitiute one equation into another and then equate to find one of the unknowns. Once this has been found its a simple matter of substituting it back into t...
KL
Answered by Kishen L. • Maths tutor
4022 Views