Final answer:
To find the sum of all numbers in a given vector, we add the numbers following basic arithmetic rules. For example, sum of vector [1 2 3 5] is 11, and sum of vector [42 -1] is 41.
Step-by-step explanation:
The student's question is revolving around finding the sum of a list of numbers in a vector. Adding numbers together, whether they're positive, negative, or a combination of both, follows specific arithmetic rules. Two positive numbers added together retain a positive sign, while two negative numbers added together retain a negative sign. For numbers with opposite signs, subtract the smaller number from the larger number, and use the sign of the larger number in the result. For the provided examples, we add the numbers in each vector to find the sum.
For the first input x = [1 2 3 5], the sum is calculated by simply adding the numbers together: 1 + 2 + 3 + 5, which equals 11. For the second input x = [42 -1], the sum is also found by addition: 42 + (-1), which equals 41.
Thus, adding vectors like these involves summing all their components. To solve such problems effectively, it's important to follow the arithmetic rules and apply them consistently for accurate results. It might be helpful to also understand the concepts of vector addition if this topic were to extend into the realm of physics or advanced mathematics.