What can you see? [ ] A. I can see a
| What can you see? |
| [ ] |
| A. I can see a bed in the bedroom. B. The bed is in the bedroom. C. Yes, I can. |
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已知：a，b，c∈R+，求证：a+b+c≥ab+bc+ca．
1年前2个回答
你能帮帮他们吗
| What can you see? |
| [ ] |
| A. I can see a bed in the bedroom. B. The bed is in the bedroom. C. Yes, I can. |
已知：a，b，c∈R+，求证：a+b+c≥ab+bc+ca．
1年前2个回答
你能帮帮他们吗