evaluating rational expressions:
a) find the value of;
4x-1/x+2 for x=-3
4.-3-1/-3+2= -12-1/-3+2= -13/-1=13
b) find the value of;
if R(x)=3x+2/2x-1, find R(4)
3.4+2/2.4-1=12+2=14/7=2
exercises 7-12
7. evaluate; 3x-3/x+5 for x=-2
3.-2-3/-2+5= -9/3=-3
8. evaluate; 3x+1/4x-4 for x=5
3.5+1/4.5-4=15+1/20-4=16/16=1
9. evaluate; if R(x)=2x+9/x find R(3)
2.3+9/3= 15/3=5
10. if R(x)=-20x-2/x-8 find R(-1)
-20.-1-2=-20+2=-18/-1-8=-9 18/9=2
11. if R(x)=X-5/X-3 find r(2),R(-3.02), and R(-2.96).
Wednesday, January 6, 2010
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