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The curve C has the equation y = 2e^x -6lnx and passes through the point P with x - coordinate 1. a) Find the equation to the tangent to C at P

y = (2e-6)x + 6
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Answered by Sophie H. • Maths tutor
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Why is potential energy negative? What does that even mean?

This is really just a definition! When we ask what the potential energy of an object is, we are really asking what energy is available to be extracted. In the case of gravity: two objects separated by an inf...
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Answered by Ben T. • Physics tutor
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I'm struggling with an FP2 First-Order Differential Equations Question (Edexcel June 2009 Q3) and the topic in general!

(In terms of formatting, we'll use y' to represent dy/dx, exp() to represent the expoential e^(), int() to represent integration with respect to x, and 1ODE to mean First-Order Ordinary Differential Equation...
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Describe the differences between the primary and secondary immune responses in terms of B cells and antibody production. Include in your answer a definition of an antibody.

Antibodies are produced by B cells, mostly by plasma cells, in response to signals from other cells of the immune system. They are also known as immunoglobulins and have a Y shaped structure. When the immune...
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Answered by Hannah B. • Biology tutor
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Describe the use of harmony and tonality to express a non-musical subject in Vivaldi’s The Four Seasons. Use detailed examples from at the movement 'Spring', whilst making comparisons with other movements.

The opening of the Spring concerto depicts the arrival of this joyous season through the bright key of E major. The basso continuo plays a tonic pedal to reinforce tonic and dominant harmony, typical of the ...
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Answered by Gabrielle W. • Music tutor
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