Let . If and , show that . When does equality hold?
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Originally Posted by dori1123 Let . If and , show that . When does equality hold? Rudin, huh? What have you tried?
I know and , not sure what to do with , I'm trying to work this way, not sure if it works... =...
Originally Posted by dori1123 Let . If and , show that . When does equality hold? You want to show that . Square both sides and use the fact that . Then what you are trying to prove is equivalent to . Multiply out both sides and simplify ... .
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