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心形线ρ=a(1+cosθ)的周长为
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心形线ρ=a(1+cosθ)的周长为
A、2a
B、4a
C、8a
D、16a
时间:2021-09-01 19:52
关键词:
联大
信阳师范学院
分析选讲
答案解析
C
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心形线ρ=a(1+cosθ)的周长为
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