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Differentiate: y = xsin(x)

This is a function which is in the form, y = f(x)g(x) It's the product of two functions and so we must make use of the product rule . This is a simple formula which you have to remember: dy/dx = f'(x)g(x) + ...
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Answered by Oliver R. • Maths tutor
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A note was played on an electric keyboard. The frequency of the note was 440Hz. What does a frequency of 440 Hz mean?

A Frequency of 440Hz means that the wave is oscillating 440 times in one second. Ie. 440 waves are produced every second
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Answered by Nick P. • Physics tutor
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Differentiate x^2

To differentiate x^2 Step 1) whatever the number on the power, put that in front of x. Step 2) Then minus one (-1) from the power Therefore, by putting the number on the power in front (which is 2) and deduc...
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Answered by Anjana M. • Maths tutor
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What are the three main types words depending on the stressed syllable?

Agudas= Stressed syllable it the last syllable Llanas= Stressed syllable is the second to last syllable Esdrújulas= Stressed syllable is the third to last syllable
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Answered by Cristina O. • Spanish tutor
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Translate the following into spanish: My aunt had a lovely little house in a remote area of the British countryside.

Mi tía tenía una bonita (can also use: preciosa, mona) casa pequeña en una area (also use: zona, parte) remota de la campiña (this word is particularly challenging) inglesa.
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Answered by Cristina O. • Spanish tutor
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