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What is the tangent line to the curve y = x^3+4x+5 at the point where x = 2?

First, we must find the value of y when x = 2. y = x 3 +4x+5 = (2) 3 +4(2)+5 = 21 Then we must find the gradient of the tangent line. This can be done by differentiating y with respect to x and substituting ...
OT
Answered by Oliver T. • Maths tutor
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What events occur during the cardiac cycle?

Within the heart the atria contract creating a high pressure and squeezing blood into the ventricles. The semi lunar valves are closed so pressure within the ventricles builds up.Pressure within the ventricl...
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Answered by James H. • Biology tutor
11972 Views

Describe how a capacitor works.

If you think of electrons as tennis balls being passed around by a circle of people, then a capacitor occurs when there is a gap between 2 people which is too large for the ball/electron to be passed on. Thi...
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Answered by Charlotte W. • Physics tutor
4905 Views

How can I tell when I need to use the subjunctive?

In your written exam, you may need to conjugate verbs correctly but without being told which tense they should be, or whether or not they should be in the subjunctive. Instead of trying to memorise the hundr...
KM
Answered by Katherine M. • French tutor
3465 Views

How do you write an A* synoptic essay?

To achieve an A* in your synoptic essays you must show breadth of knowledge as well as depth. What examiners want to see when they mark your answers is that you have a thorough understanding of the concepts ...
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Answered by Ellie M. • Geography tutor
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