bonjour :
ex 2 :
D =
[tex] \frac{360000}{0.000006 } [/tex]
=
[tex] \frac{36 \times 10 {}^{4} }{6 \times 10 {}^{ - 6} } [/tex]
=
[tex] \frac{36}{6} \times \frac{10 {}^{4} }{10 {}^{ - 6} } [/tex]
=
[tex]6 \times 10 {}^{ 4 + 6} [/tex]
=
[tex]6 \times 10 {}^{10} [/tex]
E =
[tex] \frac{0.0045}{150000000} [/tex]
[tex] \frac{45 \times 10 {}^{ - 4} }{15 \times 10 {}^{6} } [/tex]
=
[tex] \frac{45}{15} \times \frac{10 {}^{ - 4} }{10 {}^{6} } [/tex]
=
[tex]3 \times 10 {}^{ - 4 - 6} [/tex]
=
[tex]3 \times 10 {}^{ - 10} [/tex]
