1002^2-1002*4+4896^2+208*896+104^2(181^2-61^2)/(301^2-181^2)已知x+(1/x)=-3,求x^2+(1/x^2)的值．
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1002^2-1002*4+4896^2+208*896+104^2(181^2-61^2)/(301^2-181^2)已知x+(1/x)=-3,求x^2+(1/x^2)的值．1002^2-1002*
1002^2-1002*4+4896^2+208*896+104^2(181^2-61^2)/(301^2-181^2)已知x+(1/x)=-3,求x^2+(1/x^2)的值．
1002^2-1002*4+4
896^2+208*896+104^2
(181^2-61^2)/(301^2-181^2)
已知x+(1/x)=-3,求x^2+(1/x^2)的值．
1002^2-1002*4+4896^2+208*896+104^2(181^2-61^2)/(301^2-181^2)已知x+(1/x)=-3,求x^2+(1/x^2)的值．
1002^2-1002*4+4 =(1002-2)^2=1000000
896^2+208*896+104^2=(896+104)^2=1000000
(181^2-61^2)/(301^2-181^2)
=(181+61)(181-61)/(301+181)(301-181)
=242x120/482x120
=121/241
x+(1/x)=-3,
两边平方,
x^2+(1/x^2)+2=9
x^2+(1/x^2)=9-2=7
1002^2-1002*4+4896^2+208*896+104^2(181^2-61^2)/(301^2-181^2)已知x+(1/x)=-3,求x^2+(1/x^2)的值．
999^2-1002*998
2+4+6+8+.+1000+1002
1×2+2×4+3×6+...+1002×2004/1×5+2×10+3×15+...+1002×5010
2+4+6+8+---------+1002+4+6+8+-----------+100
1×5+2×10+3×15...1002×5010/1×2+2×4+3×6...1002×2004 ji 简便
1又2/3+2又3/4+..+1000又1001/1002+1001又1002/1003=?
简便运算.999^2-1002•998
(2004-1)+(2003-2)+.+(1003+1002)=?
公式法因式分解,1.1002^2-1002×4+42.80062-1600×798+798^2
1/1*2+1/2*3+1/3*4+…+1/1001*1002
1/1*2+1/2*3+1/3*4+……+1/1001*1002
1+2+3+4+……+1000+1001+1002+10003+……+9999+10000=
1+2+3+4+5.+99+100+101+102+.+1000+1001+1002 +1003+.+10000=?
数1 2 3 4 5 6 7 8 ... 1000 1001 1002数一千个数
1+2+3+4+5+6+7+8+9+10.+1001+1002=?
1002一1001+1000一999+……+4一3+2一1简算
1+2+3+4+5+6+7+8+9+.+1000+1002=?