如果2()3=2X3X4,4()2=4X2X3计算6()3=?5()2=?(1()2)()3=?
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如果2()3=2X3X4,4()2=4X2X3计算6()3=?5()2=?(1()2)()3=?
如果2()3=2X3X4,4()2=4X2X3计算6()3=?5()2=?(1()2)()3=?
如果2()3=2X3X4,4()2=4X2X3计算6()3=?5()2=?(1()2)()3=?
说明()隐藏着一种运算:前后两者相乘并乘以后者下一个整数.所以(1)6()3=6*3*4=72.(2)5()2=5*2*3=30.(3)(1()2)()3=1*2*3()3=6()3=72
1/2x3x4+1/3x4x5+1/4x5x6+……+1/48x49x50=x是乘号!过程.答案.
1x2=1/3x(1x2x3-0x1x2)2x3=1/3x(2x3x4-1x2x3)3x4=1/3x(3x4x5-2x3x4)求1x2x3+2x3x4+3x4x5+...+7x8x9=?
1/1x2x3+1/2x3x4+1/3x4x51/2x3x4 + 1/3x4x5 + 1/4x5x6 +……+1/99x100x101是 1/(2x3x4)
2/1x2x3+2/2x3x4+2/3x4x5+2/4x5x6+...+2/98x99x100=
1x2x3+2x3x4+3x4x5+4x5x6+...+n(n+1)(n+2)=
请1/1x2x3+1/2x3x4+1/3x4x5+1/4x5x6=
1x2x3+2x3x4+...+nxx=?
1x2x3+2x3x4+3x4x5+...+7x8x9=,
1x2X3+2x3X4+3x4X5+…+7X8X9=?
f(x)=x1∧2-2x1x2 x2^2-x3^2-4x3x4-2x4^2正交变换
如果2()3=2X3X4,4()2=4X2X3计算6()3=?5()2=?(1()2)()3=?
如果定义(3)=2x3x4,(5)=4x5x6,(9)=8x9x10,那么(4)+(6)是多少?
规定(3)=2X3X4,(4)=3X4X5,(5)=4X5X6,.如果1/(6)+1/(7)=1/(7)X·,那么· 等于多少
1/1x2x3+1/2x3x4+1/3x4x5+1/4x5x6+1/5x6x7=?这类题
1x2=1|3(1x2x3-0x1x2) 2x3=1|3(2x3x4-1x2x3) 3x4=1|3(3x4x5-2x3x4)由此推断1x2x3+2x3x4+3x4x5.7x8x9=?
1x2x3+2x3x4+.+nx(n+1)(n+2)=?
1x2x3+2x3x4+.+n(n+1)(n+2)=?
定义1*4=1x2x3x4 2*3=2x3x4 求6*3 5*4