编程求两种情形下对应x点处二阶导数值,函数文件第一行格式已确定
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- threenewbee 2023-04-16 23:06关注
syms a x y; y = a * exp(x) / sqrt(a + x^2); % a = 2, x = 3a a1 = 2; x1 = 3 * a1; y1 = subs(y, {a, x}, {a1, x1}); diff_y1 = diff(y, x); diff2_y1 = diff(diff_y1, x); result1 = eval(subs(diff2_y1, x, x1)); % a = 3, x = 2a a2 = 3; x2 = 2 * a2; y2 = subs(y, {a, x}, {a2, x2}); diff_y2 = diff(y, x); diff2_y2 = diff(diff_y2, x); result2 = eval(subs(diff2_y2, x, x2));
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