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結果 (英文) 1:

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結果 (英文) 3:

S" return to the expression Let (a + b) 4 = A4 + 6a2b2 + 4ab3 + B4 for the moment. 4a3b If we were to write this expression in the text of a paragraph (as we are doing and we find it) if necessary to write portions of this expression on two separate lines, then this expression should be broken so that the first line ends with an operation or comparative symbol such as +, -, <, > =. Or. Other word the, second line should not In begin with one of these symbols. The reason for doing this is that ending the line with one of these symbols alerts the reader that more will follow otherwise, the reader might; conclude (incorrectly) that the portion of the expression appearing on the first line is the entire expression. Consequently, write