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I1/4-1/2I+I1/6-1/4I+I1/8-1/6I...+I1/2010-1/2008I
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I1/4-1/2I+I1/6-1/4I+I1/8-1/6I...+I1/2010-1/2008I
▼优质解答
答案和解析
I1/4-1/2I+I1/6-1/4I+I1/8-1/6I...+I1/2010-1/2008I
=1/2-1/4+1/4-1/6+1/6-1/8+^+1/2008-1/2010
=1/2-1/2010
=502/1005
=1/2-1/4+1/4-1/6+1/6-1/8+^+1/2008-1/2010
=1/2-1/2010
=502/1005
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