Maths Olympiad
Exam
Numerical Ability
find the value of k for which 5x+3y=7 and 4x+ky=14 has no solution
Read Solution (Total 1)
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- there is a property for this, consider two lines
a1(X)+ b1(y) = c1
a2(x)+ b2(y) = c2
then for no solution
(a1/a2)=(b1/b2)and not equal to (c1/c2)
so, 5/4 = 3/k
on solving k = 12/5 = 2.4 - 10 years agoHelpfull: Yes(0) No(0)
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