Le tableau de variation de la fonction continue
$f$ entre
$-\mathrm{\infty}$ et
$20$
est le suivant :
La fonction
$f$ est-elle positive ou nulle sur [
$-\mathrm{\infty},20$] ?

**Remark.** Choose 'none of the above is correct', if you think that the correct
choice is not among those presented.

The series of exercises is not finished; you have to finish it
to obtain a score. If you confirm that you wish to to abandon,
the work already made on the series will then be lost and there will be a new statement
for the same series of exercises.

Do you confirm?

This is exercise number 1 in a series of 6 exercises.

Please take note that WIMS pages are interactively generated; they are not ordinary HTML files. They must be used interactively ONLINE. It is useless for you to gather them through a robot program.

- Description: collection d'exercices sur l'interprétation du tableau de variation. This is the main site of WIMS (WWW Interactive Multipurpose Server): interactive exercises, online calculators and plotters, mathematical recreation and games
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