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I am working my way through Serge Langs A first course in Calculus and have encountered this question/proof which i am not sure how to do. Any assistance much appreciated.

Let a,b,c,d > 0 such that a/b > c/d Prove that

a/b < (a+c)/(b+d)

?

Thanks

David.

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# Homework Help: How do i prove this ?

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