1.(5/7*4/7+4/7)/4/7
安规律填空:(1):1,2,5,10,17,( ),( ).(2):29,( ),( ),11,7,4,2,1.
脱式计算:1.(1/7-1/9)×63-2/3 2.8/15×[3/4+(7/16-1/4)]
10^4×10^0÷10^-2等于?(1/2)^0÷(-1/7)^-1.等于?
1.(-8)+10+2+(-1) 2.5+(-6)+3+9+(-4)+(-7) 3.(-8)+1.2+(-0.7)+(2
1.(2+5+8+...+2000)-1+4+7+...1999 (2000-2)/3+1-1=666
1.y=2x^2+4X-7\x^2+2x+3 求定义域和值域
计算:1.( x^2-4x-21 )除以(x-7) 2.[(m+n)^2+(m^2+n^2)]
1.(7+4√3)(2-√3)^2+(2+√3)(2-√3)-√3
就两题!快10,9,8,7,6,5,4,3,2,1.
化简,计算1.化简.(1) -(+7) (2) -[-(-3)] (3) -|+[-(-200]| (4) +[-(-1
1.(-0.5)-(-3又1/4)+2.75-(+7又1/2)