(2)>> syms x >> f=sqrt(x^2+1) f = (x^2 + 1)^(1/2) >> diff(f) ans = x/(x^2 + 1)^(1/2) >> x=2 x = 2 >> x/(x^2+1)^(1/2) ans = 0.8944 >> x=...
求函数在指定点的数值导数。x2 x3 xf(x)12x3x2,x 1,2,326x解:M文件:clc;clear;x=1;i=1;f=inlin e('det([x xA
>> f=inline('sqrt(x.^2+1)'); %定义函数f(x) >> x1=1;x2=2;x3=3; >> h=0.01; %步长 >> y1=diff(f([x1,x1+h]))/h %求f’(1) y1 = 0.7089 >> y2=diff(f([x2,x2+h]))/h %求f’(2) y2 = 0.8949 >> y3=diff(f([x3,x3+h]))/h %求f’(3)...
定义一个函数 fx = @(x) x.^3;创建函数自变量x的值范围 x=0:0.01:2;查找x=1位置 k = find(x==1);求f在x_point处的导数 d_f = diff(fx(x)/0.01;在x=1处的数值导数 d_f(k)在上述例子中,我们定义了一个简单的函数f(x)=x³,然后在x = 1处求它的导数。diff函数是...
解答一 举报 clear;clc;syms xf = sqrt(x^2+1);diff_f = diff(f);y1 = subs(diff_f,x,1)y2 = subs(diff_f,x,2)y3 = subs(diff_f,x,3)结果:y1 =0.7071y2 =0.8944y3 =0.9487 解析看不懂?免费查看同类题视频解析查看解答 相似问题 在matlab中求函数 的三阶导数 MATLAB求函数导数.. 运用...
f(x)=根号(x^2+1) x=1,2,3 相关知识点: 试题来源: 解析 clearclcsyms xf = sqrt(x^2+1)diff_f = diff(f)y1 = subs(diff_f,x,1)y2 = subs(diff_f,x,2)y3 = subs(diff_f,x,3)结果y1 = 0.7071y2 = 0.8944y3 = 0.9487
解答一 举报 clear;clc;syms xf = sqrt(x^2+1);diff_f = diff(f);y1 = subs(diff_f,x,1)y2 = subs(diff_f,x,2)y3 = subs(diff_f,x,3)结果:y1 =0.7071y2 =0.8944y3 =0.9487 解析看不懂?免费查看同类题视频解析查看解答 相似问题 在matlab中求函数 的三阶导数 MATLAB求函数导数.. 运用...
用matlab求函数在指定点的数值导数f(x)=根号(x^2+1) x=1,2,3 答案 clear;clc;syms xf = sqrt(x^2+1);diff_f = diff(f);y1 = subs(diff_f,x,1)y2 = subs(diff_f,x,2)y3 = subs(diff_f,x,3)结果:y1 =0.7071y2 =0.8944y3 =0.9487相关推荐 1用matlab求函数在指定点的数值导数...