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1x=2x+1=3x=4x+1=5x+1=6x+3=7x=8x+1=9x

1x9=2x4+1=3x3=4x2+1=5x1+4=6x1+3=7x+5=8x1+1=9x1是多少

2x+3x-7分之2x=15x-2x/7=135x/7-2x/7=133x/7=1x=7/33-4X+3分之2x=-3-12x/3+2x/3=3-12x+2x=9-10x=9x=-9/104x+3=5x-15x-4x=3+1x=4-8x+3=5x-35x+8x=3+313x=6x=6/13

(1+2+3+4+5+6+7+8+9+10)x@=55@=1980 @=1980//55=36

当1/6>x>1/7时, p=1-4x+1-5x+1-6x+7x-1+8x-1=1

1x2/1+2x3/1+3x4/1+4x5/1+5x6/1+6x7/1+7x8/1+8x9/1+9x10/1 =1/2+1/6+1/12+1/20+1/30+1/42+1/56+1/72+1/90 =(1-1/2)+(1/2-1/3)+……+(1/8-1/9)+(1/9-1/10) =1-1/10 =9/10

x当x=-1时,3x-1=-4≠3,所以x=-1不是方程3x-1=3的解;当x=-1时,3x+4-4x=-3+4+4=5,3-2x=3+2=5,所以x=-1是方程3x+4-4x=3-2x的解;当x=-1时,5x-12=-17,7x=-7,所以x=-1不是方程5x-12=7x的解;当x=-1时,7x-9=-16,8x-10=-18,所以x=-1不是方...

f(X) =(((((3*X+4)*x+5)*x+6)*x+7)*x+8))*x+1 乘法:6,加法:6次,共12次

8x-4x=1 4x=1 X=0.25

12次

=(1-6)X(1-15)X(1-27/2)X(1-63/5)X(1-4)X(1-27/7)X(1-15/4)X(1-11/3) =5X14X(1-27/2)X(1-63/5)X3X(1-27/7)X(1-15/4)X(1-11/3) =5X(1-63/5)X2X(1-27/2)X7X(1-27/7)X3X(1-11/3)X(1-15/4) =(-58)X(-25)X(...

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