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The best method to revise is through solving past questions and timed exam papers. As long as you have your notes and understand all the basic principles, then you just need to practice in order to avoid ...

Let $ denote the integral symbol, as I am limited here by my keyboard.

Recall the formula for integration by parts:

$ u.(dv/dx) dx = uv - $ u(dv/dx) dx

So to find $^pi_0...

The active transport of hydrogen ions out of the companion cells using ATP creates a hydrogen ion gradient.This causes the facilitated diffusion of H⁺ ions back into companion cells. This occur...

Ca(OH)2 + 2HNO3 --> Ca(NO3)2 + 2H2O

To begin with, we should find the equation of the line. To do this we appoint a position vector and a direction vector. The position vector can simply be one of the two points we are give, i.e. (6,4,1). T...