vba编程求解一元二次方程的方法
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亲,首先设定一元二次方程形式:ax2 + bx + c = 0,其中a、b、c是要求求解的系数。 步骤:(1)根据一元二次方程的解法:当a≠0时:x1 = [-b + √(b2 - 4ac)]/[2a] x2 = [-b - √(b2 - 4ac)]/[2a] 当a=0时: x1 = -c/b(2)利用VBA编程求解: 设a=3,b=5,c=3Sub QuadraticEquations()Dim x1 As DoubleDim x2 As DoubleDim a As Integer Dim b As IntegerDim c As Integera=3b=5c=3If a= 0 Thenx1 = -c / b MsgBox "x1 = " & x1 Elsex1 = (- b + Sqr(b ^ 2 - 4 * a * c)) / (2 * a) x2 = (- b - Sqr(b ^ 2 - 4 * a * c)) / (2 * a)MsgBox "x1 = " & x1 & ";" & "x2 = "
咨询记录 · 回答于2023-03-08
vba编程求解一元二次方程的方法
亲,首先设定一元二次方程形式:ax2 + bx + c = 0,其中a、b、c是要求求解的系数。 步骤:(1)根据一元二次方程的解法:当a≠0时:x1 = [-b + √(b2 - 4ac)]/[2a] x2 = [-b - √(b2 - 4ac)]/[2a] 当a=0时: x1 = -c/b(2)利用VBA编程求解: 设a=3,b=5,c=3Sub QuadraticEquations()Dim x1 As DoubleDim x2 As DoubleDim a As Integer Dim b As IntegerDim c As Integera=3b=5c=3If a= 0 Thenx1 = -c / b MsgBox "x1 = " & x1 Elsex1 = (- b + Sqr(b ^ 2 - 4 * a * c)) / (2 * a) x2 = (- b - Sqr(b ^ 2 - 4 * a * c)) / (2 * a)MsgBox "x1 = " & x1 & ";" & "x2 = "
可以使用VBA编程来求解一元二次方程,可以按照以下步骤进行:1. 定义变量,包括方程的三个系数a、b、c2. 计算判别式delta,delta=b^2-4ac3. 判断delta的值,如果delta>0,则方程有两个不相等的实数解;delta=0,则方程有一个实数解;delta<0,则方程没有实数解。4. 根据情况,求出方程的解。以下是一个VBA求解一元二次方程的例子:```Sub Quadratic_Equation() Dim a As Double Dim b As Double Dim c As Double Dim delta As Double Dim x1 As Double Dim x2 As Double '输入方程系数 a = InputBox("请输入a:") b = InputBox("请输入b:") c = InputBox("请输入c:") '判断delta的值 delta = b ^ 2 - 4 * a * c If d