It is known that the number a is 1.4 times that of the number B, and the difference between the two numbers is 9.8

It is known that the number a is 1.4 times that of the number B, and the difference between the two numbers is 9.8

Let B be x, then a is 1.4x. According to the meaning of the question, we can get the equation: 1.4x-x = 9.8, & nbsp; & nbsp; 0.4x = 9.8, & nbsp; & nbsp; & nbsp; & nbsp; X = 24.5, a: B is 24.5

When k is the value, the equation x divided by X-1 + K divided by X-1 = x divided by X + 1 has an increasing root
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The original equation has increasing roots
Ψ x = 1 or x = - 1
(1+k)/(x-1)=x/(x+1)
(1+k)/(x-1)-x/(x+1)=0
/(x2-1)=0
(1+k)(x+1)-x(x-1)=0
When x = 1
2(k+1)=0
k=-1
When x = - 1
K has no solution
So when k = - 1, the original equation has an increasing root``
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