a+b=4,ab=3,find the sum of receiprocals of a and b  Select:
A) 4/3
B) 3/4
C) 5/3
D) 3/5
E) 1/5
1/a+1/b=a+b/ab,   so 1/a+1/b=a+b/ab   =4/3   4/3NSWER:4/3
<result>A</result>
a+b=4,ab=3,find the sum of receiprocals of a and b