Question at position 10 In the following expression, which will be the second calculation run by MATLAB? X = (2+4)^2*(1+3)/2 ^2(2+4)(1+3)*单项选择题
A
^2
B
(2+4)
C
(1+3)
D
*

Question

Question at position 10 In the following expression, which will be the second calculation run by MATLAB? X = (2+4)^2*(1+3)/2 ^2(2+4)(1+3)*

BlackTom AI · Accepted Answer

To analyze the expression, I’ll go step by step and consider how MATLAB evaluates it based on standard precedence rules.

Option by option reasoning:
- Option ^2: This corresponds to the exponent operation applied to the result of (2+4). MATLAB evaluates inside parentheses first, so (2+4) computes to 6, and the next calculation in sequence is raising that 6 to the power of 2, i.e., 6^2. This sequencing matches MATLAB’s evaluation order, making ^2 the second calculation that MATLAB performs in this expression.

- Option (2+4): This would be the first calculation performed since MATLAB must compute the value inside the first parentheses before applying the exponent, i.e., (2+4) becomes 6 before any exponent or multiplication takes place. Therefore, (2+4) is the first calculation, not the second.

- Option (1+3): This subexpression is inside its own parentheses and would be computed after the initial (2+4) and its exponent due to the left-to-right handling of sequential operations within the overall expression, and because those terms are multiplied/divided after the first exponent is resolved. Hence, (1+3) is not the second calculation.

- Option *: The multiplication operator appears after several other steps (and there are implied multiplications after divisions as the expression unfolds), but the actual numeric computations happen in a certain sequence determined by parentheses and exponent precedence. The asterisk itself is not a calculation step; it indicates multiplication and is not the second discrete calculation.

So, the second calculation MATLAB performs is the exponent operation on the first parenthesized value, i.e., the ^2 applied to (2+4).

Note on the provided answer: the listed answer option in the data shows '(1+3)'. While (1+3) is a real subexpression that will be evaluated, it is not the second calculation MATLAB performs in this expression given the precedence rules described above.

Question at position 10 In the following expression, which will be the second calculation run by MATLAB? X = (2+4)^2(1+3)/2 ^2(2+4)(1+3)单项选择题

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