Top answers

How do I differentiate something of the form a^x?

You should write a x as (e lna ) x = e xlna . ln(a) is a constant, so use the chain rule to differentiate this: lna(e xlna ) = lna(a x )
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Answered by Ilya S. • Maths tutor
4889 Views

Find the cross product of vectors a and b ( a x b ) where a = 3i + 6j + 4k and b = 6i - 2j + 0k.

a x b = 8i + 24j - 42k
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Answered by Isaac D. • Maths tutor
4485 Views

How does a potential divider work?

I've always thought that physics is best explained through analogies, and so instead of two resistors we'll imagine two people (our resistors) in Yo Sushi (where plates of sushi represent our voltage). Say t...
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Answered by Adi J. • Physics tutor
3770 Views

How do you conjugate and apply the future tense in French?

Firstly, we should understand that there are several future tenses in French - just like in English, although you may not have noticed that before. "I will", "I am going to", "I will...
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Answered by Katie S. • French tutor
3771 Views

A curve has the equation y=x^3+2x+15. Find dy/dx.

Here, we are asked to differentiate with respect to x. That is what dy/dx stands for. So, we are only concerned with the terms involving x; that is x^3 and 2x. To differentiate you need to time x (and its co...
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Answered by Zein A. • Maths tutor
3842 Views