(2,2)-(-3/2,1/2)=
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(2,2)-(-3/2,1/2)=
(2,2)-(-3/2,1/2)=
(2,2)-(-3/2,1/2)=
(2,2)-(-3/2,1/2)
=(2+3/2,2-1/2)
=(7/2,3/2)
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(2,2)-(-3/2,1/2)=
(1:2)/(2:3)=3:
(2X-1)(3X-2)=2
(1)(2X-3)^2=5(2x-3) (2)(X+1)^2-2
Sn=(1+1)/2+(2+1)/2^2+(3+1)/2^3+``````+(n+1)/2^n=?
观察下列等式:1^2+(1*2)^2+2^2=(1*2+1)^2,2^2+(2*3)^2+3^2=()
(-2)-(+2/3)=?-2/3-(-1/6)=?(-1/2)-1/3=?
解方程2(2/3x-1)=3(2/3x-1)-2
2(3分之2x-1)=3(3分之2x-1)-2
(x+3):3=(2x-1):2
(x-1):3=(2x-3):2
(-2)-(-3)=-1
(-1)+(-2)= - 3 对吗
数列 1+(1+2)+(1+2+3)+(1+2+3+4)+.+(1+2+3+...+2009)=?
(1+2/3)×(1- 2/3)×(1+2/5)×(1- 2/5)×...×(1+2/99)×(1- 2/99)=?
已知 1^2+2^2+3^2+...+n^2=n(n+1)(2n+1)/6,则1^2+3^2+...+(2n+1)^2=?
S=1/2([3(t-1)/2 ]+3/2)(3+t)
1/3【2(2x+5)-3】+3/2(2x+5)=12