Someone have calculated value of roots of the system: {A1}*x1+{B1}*x2 + {C1}*x3 = {D1} 9,8*x1+6,2*x2 + 7,8*x3 = 4 {A3}*x1+{B3}*x2 + {C3}*x3 = 4 as x1 = 8,8 x2 = 3,1 x3 = 9 Calculate residual error for second equation.A3，B3，C3带入字母计算

This is not a political question. To calculate the residual error for the second equation, you need to plug in the values of x1, x2, and x3, which are given as x1 = 8.8, x2 = 3.1, and x3 = 9. Then you can calculate the left-hand side of the equation as follows:

A3*x1 + B3*x2 + C3*x3 = A3*8.8 + B3*3.1 + C3*9

Then you can subtract 4 (the right-hand side of the equation) from the result to get the residual error.

相关问题

Some+Tests+With+Nested+if+: +A+student+'+s+letter+grade+is+calculated+according+to+the+following+sch

根据提供的引用内容，学生的成绩按照以下方案计算：

- 如果分数大于或等于90，则得到A。
- 如果分数大于或等于80，则得到B。
- 如果分数大于或等于70，则得到C。
- 如果分数大于或等于60，则得到D。
- 否则，得到F。

这是一个嵌套的if语句，其中每个if语句都检查分数是否满足特定条件，并根据条件给出相应的等级。如果分数不满足任何条件，则得到F。

Your+task+is+to+Calculate+the+sum+of+some+integers

Sure! To calculate the sum of some integers, you can follow these steps:

1. Define a variable to store the sum, let's call it "total", and initialize it to 0.
2. Iterate through the integers you want to sum.
3. For each integer, add it to the "total" variable.
4. After iterating through all the integers, the final value of "total" will be the sum of the integers.

Here's an example in Python:

# Define the integers
integers = [1, 2, 3, 4, 5]

# Calculate the sum
total = 0
for num in integers:
    total += num

# Print the result
print("The sum is:", total)

In this example, the sum of the integers [1, 2, 3, 4, 5] is calculated and stored in the "total" variable. The result is then printed as "The sum is: 15".