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These two preposition may sometimes be confused because they often translate the English preposition 'in'. However, they have slight differences in meaning:

DANS when is referred to a PLA...

The 'subjuctif' is used to express willingness, obligation, a suggestion, a feeling, a judgement, a possibility, a doubt..

When we want to express an opinion using verbs such as espérer, ...

Substituting the given values for b and c into the equation for abc,

a(-2 + 3i)(1 + 2i) = -37 + 36i

Multiplying out the terms in brackets...

Both these verbs are translates as "to be", however they are used in different circumstances.

the verb "ser" is used to express permanent states of being, such as char...

y = e^2x(x²+1)^5/2

The first step is to calculate dy/dx. We can do this by splitting y into two parts and using the chain rule of differentiation: