作业帮(1)57*99+44*99 (2)9x^2+16(x+y)^2-24x(x+y) 因式分解
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(1)57*99+44*99 (2)9x^2+16(x+y)^2-24x(x+y) 因式分解
(1)57*99+44*99 (2)9x^2+16(x+y)^2-24x(x+y) 因式分解
(1)57*99+44*99 (2)9x^2+16(x+y)^2-24x(x+y) 因式分解
57*99+44*99
=99*(44+57)
=99*101
=(100-1)(100+1)
=100²-1
=10000-1
=9999
9x^2+16(x+y)^2-24x(x+y)
=[3x-4（x+y）]²
=（3x-4x-4y）²
=（-x-4y）²
=（x+4y）²
1)57*99+44*99
=99(57+44)
=(100-1)(100+1)
=100^2-1
=9999
(2)9x^2+16(x+y)^2-24x(x+y)
=(3x)^2--2*3*4x(x+y)+(4(x+y))^2
=(3x-4x-4y)^2
=(x+4y)^2
求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X
(1)57*99+44*99 (2)9x^2+16(x+y)^2-24x(x+y) 因式分解
x(x-1)(x-2)...(x-99)(x-100)
(1+x)+x(1+x)+x(1+x)^2+……+x(1+x)^99
1/X(X+1)+1/(X+1)(X+2)+1/(X+2)(X+3).+1/(X+99)(X+100)=
计算1/X(X+1)+1/(X+1)(X+2)+.+1/(X+99)(X+100)
解方程：2x+4x+6x...+100x=1-(x+3x+5x+...+99x)
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
1x+2x+3x+4x+5x+6x+7x…+99x=100
f(x)=x(x-1)(x-2)…(x-99)(x-100),求f'(100)
填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x
设第一个是x 则：x+x+1+x+2+x+7+x+8+x+9+x+14+x+15+x+16=171 化简得9x+72=171 9x=99 x=11为什么x+7,x+8,x+9
已知x^4+x^3+x^3+x^2+x^1+1=0,求x^100+x^99+x^98+x^97+x^96的值
80到 解方程不是应用题 3X+5X=48 14X-8X=12 6*5+2X=44 20X-50=50 28+6X=88 32-22X=10 24-3X=3 10X*（5+1）=60 99X=100-X X+3=18 X-6=12 56-2X=20 4y+2=6 x+32=76 3x+6=18 16+8x=40 2x-8=8 4x-3*9=29 8x-3x=105 x-6*5=42 x+5=7 2x+3=10 12x-9x=9 6x+18=48 56x
一道数学题：1/x-1+1/(x-1)(x-2)+1/(x-2)(x-3)+.+1/(x-99)(x-100)
分式：计算1/(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+...+1/(x-99)(x-100)
1/(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)……+1/(x+99)(x+100)
x^3+x^2+x+1=0,则x^97+x^98+x^99+.x^103=