Section 1.5 : Rational Expressions
Solution of the proposed exercises Page 35: Ex.1 Ex.3 Ex.7 Ex.14.
Ex.1 Find the domain of the rational expression:
?
● x+7=0
x=–7
The domain is the set of real number not equal to –7, written
{ x l x R, x ≠ – 7 }
Ex.3 Find the domain of the rational expression:
?
x2 – 5 x – 6 = 0
●
(x–6)(x+1)=0
x–6=0
or
x=6
or
x+1=0
x= –1
The domain is the set of real number not equal to –1, 6 written
{ x l x R, x ≠ – 1, 6 }
Ex.7 Write of the rational expression in lowest terms:
●
=
=
=
?
Ex.14 Find each product or quotient:
=
?