x0.38x1.24

计算题巧算8.4x2.3+31x0.2818.3x0.82+4.5x0.18-8.2x1.388.4x2.3+31x0.28=0.28*30*2.3+31*0.28=0.28*（69+31）=0.28*100=2818.3x0.82+4.5

整数X0,X1,.,X2012满足条件:X0=0,|X0+1|,X2=|X1+1|,.|X2012|=|X2011+1|,整数X0,X1,.,X2012满足条件:X0=0,X1=|X0+1|,X2=|X1+1|,.|X2012|=|X201

x0>x1>x2>x3>0,log(x0/x1)1993+log(x1/x2)1993+log(x2/x3)1993>=k*log(x0/x3)1993恒成立,则k最大值多少?明白了点。不过应该是：1/x+1/y+1/z>=k/(1/x+1

0.8X0.25X0.4X1.25简便计算0.8*1.25=10.25*0.4=0.1所以最后结果是1*0.1=0.152553

56X1.02-1.4X0.856×1.02-1.4×0.8=56×1.02-14×0.08=56×1.02-56×0.02=56×(1.02-0.02)=56×1=56

2.25x1.8+1.25x0.182.25×1.8+1.25×0.18＝2.25×1.8＋0.125×1.8＝1.8×（2.25＋0.125）＝1.8×2.375＝4.275

有关绝对值的题x0.x2008均为整数,x0=1,|x1|=|x0+1|,|x2|=|x1+1|.|x2008|=|x2007+1|.求、|x0+x1+.+x2008|的最小值呃.丨x0+x1+...+x2008丨≥丨x0丨-丨x1丨+丨x

f(x)=lnx,x1>x2>0,存在x0使f`(x0)=f(x1)-f(x2)/x1-x2.求证x1>x0>x2当x>y>e-1时,证明：e^(x-y)>ln(x+1)/ln(y+1)1、这个,第一题直接用中值定理呀f(x)=lnx在[x

m-X1^2/4=X1/2(X0-X1)m-X2^2/4=X2/2(X0-X2)如何消去X0变成m(X1-X2)=1/4X1X2(X1-X2)?容易啊,由第一个式子变形,把X0当未知数解出（用含X1的式子表达）,然后将这个X0代入第二个式子

o.01x0.02x0.03x...x0.23x0.24x0.25的积化简后有几位小数?0.01x0.02x0.03x...x0.23x0.24x0.25=1.55*10^-25两位小数.

1.25x0.32x2.5x1.3简算1.3原式=1.25×（0.4×0.8）×2.5×1.3=（1.25×0.8）×（0.4×2.5）×1.3=0.1×1×1.3=0.13原式=(1.25×0.8)×(0.4×2.5)×1.3=1×1×1

用简便方法计算2.9x1.4+2x0.162.9×1.4+2×0.16=（3.0-0.1）x1.4+2x(0.1+0.06)=4.2-0.14+0.2+0.12=4.38、、不明白继续追问哈.

2.5X1.36+26.4X0.25可以简算吗2.5X1.36+26.4X0.25=2.5X1.36+2.64X2.5=2.5x(1.36+2.64)=2.5x4=10

0.96X=60X0.8+(X-60)X1.20.96x=48+1.2x-721.2x-0.96x=72-480.24x=24x=24÷0.24x=100奇函数则f(0)=01-4/(2+a)=0a=2f(x)=1-4/(2*2^x+2)=

x1次方等于多少x0次方等于多少x的1次方等于xx的0次方等于1

(166x1.37-110)x0.45等于多少(166x1.37-110)x0.45=(227.42-110)X0.45=117.42X0.45=52.839(166x1.37-110)x0.45=52.839(166x1.37-110)x

16X0.25x1.25求简便计算=4*0.25*4*1.25=1*5=5原式=16*1/4*5/4=4*5/4=5

0.25X1.6+1.4X0.25+0.25的简便计算0.25X（1.6十1.4十1）＝0.25X4＝1=0.25X(1.6+1.4+1)=0.750.25x(1.6+1.4+1)（1.6+1.4）0.25+0.25

0.25x1.25x0.4x8简便计算(0.25x0.4)x(1.25x8)

2.25x1.8+1.25x0.18简便计算2.25×1.8+1.25×0.18=2.25×1.8+0.125×1.8=(2.25+0.125)×1.8=2.375×(2-0.2)=2.375×2-2.375×0.2=4.75-0.475=