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OpenStudy (anonymous):
Prove that abs(x) <= abs(x+y)+abs(y)?
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OpenStudy (anonymous):
I attempted abs(a)+abs(b) >= abs(a-b) So I got, abs(x+y) +abs(y) >= abs(x+y -y). Then just reduced right to abs(x+y) +abs(y) >= abs(x) Is this right or not enough proof?
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