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20 12 Jiangsu mathematics college entrance examination 14 questions
Standard answer: method hint: let y = a/b and x = a/c.

Inequality can be changed into: 5/x-3; = (e to the power of x) /x

The solution set area and y range are obtained by using the image.

Y = (e to the power of x) /x This image is not easy to draw, but it can be deduced that if you decrease at (0, 1) and increase at (1, positive infinity), you can draw a rough image.