Let Z be a nonnegative

Prove that if x and y are nonnegative real numbers, then (x+y)/2 ≥ sqrt(xy).Use the technique of working backward from the
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2. asked by Meg
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If true, prove. If false, provide just a counterexample:a. For every function f from nonnegative integers into nonnegative
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2. asked by huing
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Let $x$ and $y$ be nonnegative real numbers. Find the smallest real number $k$ such that\[\sqrt{x} + \sqrt{y} \le k \sqrt{x +
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2. asked by becky
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When is the following a true statement ?(a+b) = a + b if a and b are nonnegative.
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2. asked by laura
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When is the following a true statement?�ã(a+b) = �ãa + �ãb if a and b are nonnegative.
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2. asked by laura
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How many nonnegative integer solutions does the equation x+y+z+t = 15 have?
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2. asked by picklepeter
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If /x/ = -x, then x mst beA. Positive B. Nonnegative C. Negative D. Nonpositive E. Zero
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2. asked by Anonymous
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What is the ANSWER??If /x/ = -x, then x mst be A. Positive B. Nonnegative C. Negative D. Nonpositive
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2. asked by Anonymous
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Let $x$ and $y$ be nonnegative real numbers. If $x^2 + 5y^2 = 30$, then find the maximum value of $x + y$.
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2. asked by Fiona
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Let $x$ and $y$ be nonnegative real numbers. If $x^2 + 3y^2 = 18$, then find the maximum value of $x + y$.
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2. asked by Melanie
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