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How do you know if a function is odd or even?

For this I would use the whiteboard to draw an even function (i.e cos(x)) and show that if f(x) is even then f(x) = f(-x). I would also show that the function would be symmetrical about the y axis. For an od...
Answered by • Maths tutor
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Describe the process of DNA replication

DNA replicates via semi-conservative replication . This means one strand acts as the template strand. The enzyme DNA Helicase breaks the hydrogen bonds between base pairs in DNA. This unwinds the DNA, exposi...
JD
Answered by Joanna D. • Biology tutor
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What is the inverse of a function and how do you find it?

A function, f(x), is something that takes various input values of x, and for each one, generates an output value, e.g. if f(x) = x 2 then when x=3, f(x) = f(3) = (3) 2 = 9, which is the output of the functio...
JM
Answered by Jack M. • Maths tutor
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How do I form the present subjunctive?

For regular verbs, the present subjunctive is formed differently depending on whether the verb ends with -ar or -er/ir. For -ar verbs , take the first person singular of the present tense of the verb, remove...
IW
Answered by Isabel W. • Spanish tutor
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The perimeter of a right-angled triangle is 72 cm. The lengths of its sides are in the ratio 3 : 4 : 5 Work out the area of the triangle.

Work out the lengths of each side; do so by adding the ratio components together (3+4+5).The components add to 12; we can now find the value of a single unit of the ratio, by dividing 72 by 12.72/12 is 6; ea...
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Answered by Lorissa F. • Maths tutor
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