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There are two ways we can find the derivative of x^x. It's important to notice that this function is neither a power function of the form x^k nor an exponential function of the form b^x, so we can't use the ...

Always follow the same three steps : equating – substracting – substituting but you can have different cases : Case 1 : we only need to multiply one equation Example: 2x+5y=9 6x-4y=8 Note : Always check firs...

Adjective Agreements The following are simple points to remember in order to avoid losing marks in an exam for forgetting to make adjectives agree . It is important to be able to check and correct your own w...

The material is made up from nylon laminated with a PTFE / polyurethane membrane. The m embrane is too fragile on its own hence why it is combined with the nylon. T he h oles in membrane are too small for wa...

Lasers produce an intense coherent beam of light because the waves have the same frequency, are in phase with each other and have a low divergence.