1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
2个回答
X(1+2+3+4+5+6+7+8+9+10+11)=1980,
X66=1980
等于30
相关问题
1X?+2X?+3X?+4X?+5X?+6X?+7X?+8X?+9X?+10X?=1980求?是多少
1)2x+8=16 (2)x/5=10 (3)x+7x=8 (4)9x-3x=6 (5)6x-8=4 (6)5x+x=9
1x2x3x4x5x6x7x8x9x10等于多少?
1&6=1X2X3X4X5,6&6=6X7X8X9X10.据此求:(2&5)÷(6&5)
(x-1)(x^10+x^9+x^8+X^7+x^6+x^5+x^4+x^3+x^2+x+1)=?
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小明做一道数学题,"求代数式10x^9+9x^8+8x7+7x^6+6x^5+5x^4+4x^3+3x^2+2x^1+1
某同学做一道数学题,求代数式1+2x+3x^2+4x^3+5x^4+6x^5+7x^6+8x^7+9x^8+10x^9,
1x2x3x4x5x6x7x8x9x10.x20=?
(1)5+2x=1 (2)8-x=3x+2 (3)10x-3=9 (4)6x-7=4x-5 (5)1/2x-6=3/4x