[填空题]
In a memory competition, the ratts1ba;ou+x7 zi / ff8qe at which Engl2i p b:hu0 bib5mt7b3fish speaking participants memorise French vocabulary can be modelled by the equationb0 bi h:53bibmf27up t
$\frac{d M}{d t}=1-0.01 t$, $\quad t \geq 0$,
where M(t) is the number of words memorised in t minutes.
The number of words participants have memorised at the beginning of the competition, t=0 , is zero.
1. Find the equation for the number of memorised words at time t . M(t)= t - a$^{-3}$ t$^2$ ; a= .
The competition ends when students get so tired that the number of additional memorised words per minute becomes zero.
2. Find the value of t when the competition will end.
t= minutes.
3. Determine
1. the domain of M(t) is [ , ],
2. the range of M(t) is [ , ].
