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f(x)=ln(x). Find the area underneath the curve f(x) between 1 and 2.

We cannot dirrectly intergrate ln(x), so instead we intergrate 1 ln(x) using intergration by parts. The formula for intergration by parts is: ∫ (u dv/dx) dx = uv − ∫ v du/dx dx . We let u=ln(x) so that du/dx...
AT
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Solve 29cosh x – 3cosh 2x = 38 for x, giving answers in terms of natural logarithms

Firstly, we need the equation to be in terms of one cosh argument if possible, which can be done by the identity cosh 2x = 2cosh 2 x - 1. Upon substitution and simplification we get 6cosh 2 x - 29cosh x + 35...
JC
Answered by Jacob C. • Maths tutor
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Describe how ions, water and sugar are obtained and transported through plants. In your answer you should refer to materials moving upwards and downwards in a plant. (6 marks)

Since this is a 6 marker, it is important for you to firstly express yourself coherently, and secondly write the 'key words' that examiners look for. The question is referring to the transport processes of t...
ZI
Answered by Zahra I. • Biology tutor
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Balance the following equation for the formation of magnesium chloride: Mg + HCl --> MgCl2 + H

Mg + 2 HCl --> MgCl2 + H 2 There are two chlorines in magnesium chloride so you put a two in front of the hydrochloric acid. This means that you need to put a 2 after the hydrogen gas.
HG
Answered by Helen G. • Chemistry tutor
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What is Ionic bonding?

Ionic bonding is bonding between a metal and a non-metal . This happens due to a transferal of electrons. For example a metal from group 2 such as Magnesium bonding to a non-metal from group 6 such as oxygen...
BB
Answered by Bobby B. • Chemistry tutor
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