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Use Implicit Differentiation to find dy/dx of the following equation: 3(x)^2 + 8xy + 5(y)^2 = 4

(This is a common question in C4, the "hardest" module of the old A level)When differentiating we consider each term one at a time:Differentiating 3x 2 simply gives us 6x Differentiating 8xy is har...
RP
Answered by Reece P. • Maths tutor
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What's the difference between a dominant 7th, a diminished 7th and a major 7th chord?

The dominant 7th is commonly used in classical and jazz repertoire to lead back to the tonic, often as part of a perfect cadence. Referring to the dominant 7th chord itself, the 3rd rises by a semitone and t...
EH
Answered by Edward H. • Music tutor
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What is more important, close reading or big ideas?

It's important to remember that we generally use close reading to facilitate wider discussion about texts, not as an 'end in itself', so it is important to have a combination of both in your essays. The exci...
AM
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How does adrenaline act on the body?

Actions of Adrenaline Heart Cardiac Output = Heart rate X Stroke VolumeIncreases Total peripheral resistance = Increases Blood pressureOverall effect Lungs Dilation of bronchiolesIncrease in tidal volumeIncr...
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Answered by Ajit A. • Biology tutor
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Explain the different types of unemployment.

There are three main types of unemployment: real-wage (classical), demand-deficient (cyclical), and equilibrium unemployment (which includes seasonal, frictional, and structural unemployment). Real wage unem...
MP
Answered by Maria P. • Economics tutor
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