Bonjour,
La fonction inverse :
f(x)=1/x
Donc :
a)
f(x)=2 <=> 1/x=2
<=> 1=2x
<=> x=1/2
b)
f(x)=-0,02 <=> 1/x=-0.02
<=> 1/x=-2/100
<=> x=-100/2
<=> x=-50
c)
f(x)=10^(4) <=> 1/x=10000
<=> 1=10000x
<=> x=1/10000
<=> x=0.0001
d)
f(x)=10-3=7 <=> 1/x=7
<=> 1=7x
<=> x=1/7
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Bonjour,
La fonction inverse :
f(x)=1/x
Donc :
a)
f(x)=2 <=> 1/x=2
<=> 1=2x
<=> x=1/2
b)
f(x)=-0,02 <=> 1/x=-0.02
<=> 1/x=-2/100
<=> x=-100/2
<=> x=-50
c)
f(x)=10^(4) <=> 1/x=10000
<=> 1=10000x
<=> x=1/10000
<=> x=0.0001
d)
f(x)=10-3=7 <=> 1/x=7
<=> 1=7x
<=> x=1/7