1/(2/3)/(3/4)/(4/5)./(2008分之2009) /是除号1/(2/3)/(3/4)/(4/5)........../(2009分之2008) 打错
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1/(2/3)/(3/4)/(4/5)./(2008分之2009)/是除号1/(2/3)/(3/4)/(4/5)........../(2009分之2008)打错1/(2/3)/(3/4)/(4/5)
1/(2/3)/(3/4)/(4/5)./(2008分之2009) /是除号1/(2/3)/(3/4)/(4/5)........../(2009分之2008) 打错
1/(2/3)/(3/4)/(4/5)./(2008分之2009) /是除号
1/(2/3)/(3/4)/(4/5)........../(2009分之2008) 打错
1/(2/3)/(3/4)/(4/5)./(2008分之2009) /是除号1/(2/3)/(3/4)/(4/5)........../(2009分之2008) 打错
1/(2/3)/(3/4)/(4/5)./(2009分之2008)
=1/[(2/3)*(3/4)*(4/5)*...*(2008/2009)]
=1/(2/3*3/4*4/5*...*2008/2009)
=1/(2/2009)
=1*2009/2
=2009/2
1004
1/(2/3)/(3/4)/(4/5)........../(2009分之2008)
=1×3/2×4/3×5/4×.......×2009/2008
=2009/2
(1) (2) (3) (4) (5)
1)2)3)4)5)
1) 2) 3) 4) 5)
0-(+2/1)-(+5/2)-(-4/3)-(+4/1)-(-5/3)
-1-(-2)-(+3)+(-4)-(-5)
(1-2)(1-3)(3-4)(4-5)...(19-20)=
5/9+(3/4-1/2)
4/5+(3/8-1/2)
(1/3+2/3)+(1/4+2/4+3/4)+(1/5+2/5+3/5+4/5)+.+(1/100+.99/100)=
(4/5+1/4)÷2/3+3/10
1/2+(-2/3)-(-4/5)+(-1/2)-(+1/3)
2/3,1,6/5,4/3,( ),3/2
(2*3*4*5)*(1/2-1/3-1/4-1/5)
-3²×(-3)² (-1/2)×(-2/3)×(-3/4)×(-4/5)-3²×(-3)² (-1/2)×(-2/3)×(-3/4)×(-4/5)
4×(-1/2²)-3/2×(-2/5)
(1-3/2*4)*(1-3/3*5)*...*(1-3/7*9)
(-1)*(-2)*(-3)+(-2)*(-3)*(-4)+(-3)*(-4)*(-5)+~+(-100)*(-101)*(-102)
1()2()3()4