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how to write down the differential equation from a word problem, involving rate of change.

Read the word problem more than once to make sure you fully understand what is being asked and write down the variables involved. Then try to write down all the derivatives in terms of each other, using t...

CG
2857 Views

How do you use position words in Mandarin?

Some position words:

前边 qián - in front

后边 hòu - behind

左边 zuǒ - left

右边 yòu - right

上边 shàng - above

下边 xià - below

里边 lĭ - inside

外边 wài - outside...

SC
Answered by Serena C. Mandarin tutor
3303 Views

Differentiate: y = 2 ^ x

y = 2 ^ x

take ln of both sides

ln( y) = ln (2 ^ x)

using the log rules we can bring the power of x down in front of the ln

ln( y ) = x*ln(2)

differentiate both sides wr...

SH
Answered by Shantu H. Maths tutor
52887 Views

Use the concept of electronegativity to justify why the acid strengths of ethanedioic acid and ethanoic acid are different.

This is a long answer (6 mark) question, which means you need to demonstrate your written communication of scientific ideas.

The first thing I would do in a question is identify the key words.

...
OS
Answered by Olivia S. Chemistry tutor
16108 Views

Solve the following simultaneous equations: x^2-y^2=9, x - y = 1

We first notice we have a linear and non linear equation. The simplest method to solve is to substitute the linear equation into the non linear equation and then solve for one of the unknowns. Then substi...

SH
Answered by Shantu H. Maths tutor
7798 Views

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