解: 3.14×(6÷2)2×8+3.14×
________ tourists like to climb the Great Wall, and ________ them is increasing now.
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已知f(x)在R上是奇函数,且f(x+2)=﹣f(x),当x∈(0,2)时,f(x)=2x2,求f(2015).