0.4 0.76 0.75 .0.55 0.45 0.75 1.3 2.55 5.9 把这些小数成分数

0.4 0.76 0.75 .0.55 0.45 0.75 1.3 2.55 5.9 把这些小数成分数 0.4,0.16,0.75,0.55,0.045,0.77,1.3,2.55把他们化成分数如果回答得好,加分 用matlab拟合下面三组数据的三条曲线n=0:1:20q=[0.78,0.59,0.79,0.80,0.70,0.58,0.77,0.56,0.64,0.77,0.74,0.66,0.67,0.60,0.67,0.74,0.60,0.66,0.60,0.80;... 0.49,0.76,0.75,0.75,0.80,0.64,0.70,0.77,0.51,0.59,0.61,0.73,0.55,0.68,0.52,0.74,0.76 4.5×0.4+0.55×4简便运算 excel中如何0.72取0.7 0.73取0.75 0.75取0.75 0.76去0.75 0.79取0.8这样的? 35×0.76＋7.6＋76×0.55（递等式计算,可以巧算就巧算） 0.4*0.25/0.4*0.75 简便运算 27.6÷﹙0.75÷0.25﹚－0.55 matlab解变量一元方程的简单方法0.23x+7.73X^2+6.81x^3=aa是一个变量,赋值如下a=[0.02 0.09 0.25 0.4 0.55 0.76 0.2 0.3 0.5 1];因为直接解原方程,s1='0.23*x+7.73*x^2+6.81*x^3-a'x=solve(s1)解出来的x是3*1矩阵,也就是说有 化成最简分数 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0.15 0.25 0.35 0.45 0.55 0.65 0.75 0.85 0.950.12 0.16 0.24 0.36 0.48 0.720.125 0.375 0.625 0.875 在真空中,波长为0.75um的红光,波长为0.55um的黄光和波长为0.4um的紫光,频率各为多少.请说清楚一些 x^2+0.4+1.4x=0.55的解是什么 【0.75+0.9】乘0.4简便计算 简算0.4*(5/6+0.75)-2/5 {0.4+三分之二}/【{六分之五-0.75}*0.5】 15÷0.75X=0.4 12.56*0.76*0.4*8*2.5的简便算法急,今天解决 求教matlab编程正余弦函数插值画图给出一组峰值,求教如何编程画出正余弦图形峰值：（0.69,-0.75,0.74,-0.76,0.80,-0.77,0.75,-0.71,0.75,-0.77,0.74,-0.73,0.70,-0.76,0.83,-0.77,0.75,-0.76,0.80）可能没说明白,再补充