(+1)+(-3)+(+5)+(-7)…+(+101)RT,要完整运算,
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(+1)+(-3)+(+5)+(-7)…+(+101)RT,要完整运算,
(+1)+(-3)+(+5)+(-7)…+(+101)
RT,要完整运算,
(+1)+(-3)+(+5)+(-7)…+(+101)RT,要完整运算,
(+1)+(-3)+(+5)+(-7)…+(+101)
=【(+1)+(-3)】+【(+5)+(-7)】…++【+97+(-99)】+(+101)
=(-2)*25+101
=51
(+1)+(-3)+(+5)+(-7)…+(+101)
=(101-99)+(97-95)+..+(5-3)+1
=2+2+...+2+1
=25*2+1
=51
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1/3*5+1/5*7+1/7*9+……1/97*99
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