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Numerical Ability
Algebra
a+b=4,ab=3,find the sum of receiprocals of a and b
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- 1/a+1/b=a+b/ab,
so 1/a+1/b=a+b/ab
=4/3 - 9 years agoHelpfull: Yes(8) No(0)
- 1/a+1/b=a+b/ab,
so 1/a+1/b=a+b/ab
=4/3 - 9 years agoHelpfull: Yes(2) No(0)
- ab=3
b=3/a
a+3/a=4
a(sqr)-4a+3=0
solving we get
a=3,1
1/a+1/b=1/3+1=4/3 - 9 years agoHelpfull: Yes(1) No(0)
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