以符號結果定義函數

符號 > 符號計算 > 以符號結果定義函數

以符號結果定義函數

1. 以符號方式計算運算式。

按一下以複製此運算式

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  <math resultRef="13" xml:lang="zh_TW">
    <symEval xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">
      <apply xml:lang="zh_TW">
        <plus xml:lang="zh_TW" />
        <apply xml:lang="zh_TW">
          <plus xml:lang="zh_TW" />
          <apply xml:lang="zh_TW">
            <plus xml:lang="zh_TW" />
            <apply xml:lang="zh_TW">
              <pow xml:lang="zh_TW" />
              <id xml:space="preserve" xml:lang="zh_TW">x</id>
              <real xml:lang="zh_TW">2</real>
            </apply>
            <apply xml:lang="zh_TW">
              <mult xml:lang="zh_TW" />
              <real xml:lang="zh_TW">3</real>
              <id xml:space="preserve" xml:lang="zh_TW">x</id>
            </apply>
          </apply>
          <apply xml:lang="zh_TW">
            <mult xml:lang="zh_TW" />
            <real xml:lang="zh_TW">2</real>
            <apply xml:lang="zh_TW">
              <pow xml:lang="zh_TW" />
              <id xml:space="preserve" xml:lang="zh_TW">x</id>
              <real xml:lang="zh_TW">2</real>
            </apply>
          </apply>
        </apply>
        <apply xml:lang="zh_TW">
          <scale xml:lang="zh_TW" />
          <real xml:lang="zh_TW">5</real>
          <id xml:space="preserve" xml:lang="zh_TW">x</id>
        </apply>
      </apply>
      <command xml:lang="zh_TW">
        <placeholder xml:lang="zh_TW" />
      </command>
      <symResult xml:lang="zh_TW">
        <apply xml:lang="zh_TW">
          <plus xml:lang="zh_TW" />
          <apply xml:lang="zh_TW">
            <mult xml:lang="zh_TW" />
            <real xml:lang="zh_TW">3</real>
            <apply xml:lang="zh_TW">
              <pow xml:lang="zh_TW" />
              <id labels="*" xml:space="preserve" xml:lang="zh_TW">x</id>
              <real xml:lang="zh_TW">2</real>
            </apply>
          </apply>
          <apply xml:lang="zh_TW">
            <mult xml:lang="zh_TW" />
            <real xml:lang="zh_TW">8</real>
            <id labels="*" xml:space="preserve" xml:lang="zh_TW">x</id>
          </apply>
        </apply>
      </symResult>
    </symEval>
  </math>
</region>

2. 將符號運算式指派給函數 f(x)。

按一下以複製此運算式

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  <math resultRef="15" xml:lang="zh_TW">
    <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">
      <function xml:lang="zh_TW">
        <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW">f</id>
        <boundVars xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW">x</id>
        </boundVars>
      </function>
      <symEval xml:lang="zh_TW">
        <apply xml:lang="zh_TW">
          <plus xml:lang="zh_TW" />
          <apply xml:lang="zh_TW">
            <plus xml:lang="zh_TW" />
            <apply xml:lang="zh_TW">
              <plus xml:lang="zh_TW" />
              <apply xml:lang="zh_TW">
                <pow xml:lang="zh_TW" />
                <id xml:space="preserve" xml:lang="zh_TW">x</id>
                <real xml:lang="zh_TW">2</real>
              </apply>
              <apply xml:lang="zh_TW">
                <mult xml:lang="zh_TW" />
                <real xml:lang="zh_TW">3</real>
                <id xml:space="preserve" xml:lang="zh_TW">x</id>
              </apply>
            </apply>
            <apply xml:lang="zh_TW">
              <mult xml:lang="zh_TW" />
              <real xml:lang="zh_TW">2</real>
              <apply xml:lang="zh_TW">
                <pow xml:lang="zh_TW" />
                <id xml:space="preserve" xml:lang="zh_TW">x</id>
                <real xml:lang="zh_TW">2</real>
              </apply>
            </apply>
          </apply>
          <apply xml:lang="zh_TW">
            <scale xml:lang="zh_TW" />
            <real xml:lang="zh_TW">5</real>
            <id xml:space="preserve" xml:lang="zh_TW">x</id>
          </apply>
        </apply>
        <command xml:lang="zh_TW">
          <placeholder xml:lang="zh_TW" />
        </command>
        <symResult xml:lang="zh_TW">
          <apply xml:lang="zh_TW">
            <plus xml:lang="zh_TW" />
            <apply xml:lang="zh_TW">
              <mult xml:lang="zh_TW" />
              <real xml:lang="zh_TW">3</real>
              <apply xml:lang="zh_TW">
                <pow xml:lang="zh_TW" />
                <id labels="*" xml:space="preserve" xml:lang="zh_TW">x</id>
                <real xml:lang="zh_TW">2</real>
              </apply>
            </apply>
            <apply xml:lang="zh_TW">
              <mult xml:lang="zh_TW" />
              <real xml:lang="zh_TW">8</real>
              <id labels="*" xml:space="preserve" xml:lang="zh_TW">x</id>
            </apply>
          </apply>
        </symResult>
      </symEval>
    </define>
  </math>
</region>

3. 以符號方式計算函數 f(x)。

按一下以複製此運算式

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  <math resultRef="17" xml:lang="zh_TW">
    <symEval xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">
      <apply xml:lang="zh_TW">
        <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW" label-is-contextual="true">f</id>
        <id xml:space="preserve" xml:lang="zh_TW">x</id>
      </apply>
      <command xml:lang="zh_TW">
        <placeholder xml:lang="zh_TW" />
      </command>
      <symResult xml:lang="zh_TW">
        <apply xml:lang="zh_TW">
          <plus xml:lang="zh_TW" />
          <apply xml:lang="zh_TW">
            <mult xml:lang="zh_TW" />
            <real xml:lang="zh_TW">3</real>
            <apply xml:lang="zh_TW">
              <pow xml:lang="zh_TW" />
              <id labels="*" xml:space="preserve" xml:lang="zh_TW">x</id>
              <real xml:lang="zh_TW">2</real>
            </apply>
          </apply>
          <apply xml:lang="zh_TW">
            <mult xml:lang="zh_TW" />
            <real xml:lang="zh_TW">8</real>
            <id labels="*" xml:space="preserve" xml:lang="zh_TW">x</id>
          </apply>
        </apply>
      </symResult>
    </symEval>
  </math>
</region>

4. 以數值方式計算函數 f(x)。

按一下以複製此運算式

其他資訊

當您使用符號計算的輸出定義函數時，會略過您先前定義的變數。

按一下以複製此運算式

按一下以複製此運算式

按一下以複製此運算式

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  <math resultRef="25" xml:lang="zh_TW">
    <define xml:lang="zh_TW" xmlns="http://schemas.mathsoft.com/math50">
      <function xml:lang="zh_TW">
        <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW">f</id>
        <boundVars xml:lang="zh_TW">
          <id labels="VARIABLE" xml:space="preserve" xml:lang="zh_TW">x</id>
        </boundVars>
      </function>
      <symEval xml:lang="zh_TW">
        <apply xml:lang="zh_TW">
          <minus xml:lang="zh_TW" />
          <apply xml:lang="zh_TW">
            <pow xml:lang="zh_TW" />
            <id xml:space="preserve" xml:lang="zh_TW">x</id>
            <real xml:lang="zh_TW">2</real>
          </apply>
          <real xml:lang="zh_TW">5</real>
        </apply>
        <command xml:lang="zh_TW">
          <sequence xml:lang="zh_TW">
            <id xml:space="preserve" xml:lang="zh_TW">solve</id>
            <id xml:space="preserve" xml:lang="zh_TW">x</id>
          </sequence>
        </command>
        <symResult xml:lang="zh_TW">
          <matrix rows="2" cols="1" xml:lang="zh_TW">
            <apply xml:lang="zh_TW">
              <nthRoot xml:lang="zh_TW" />
              <placeholder xml:lang="zh_TW" />
              <real xml:lang="zh_TW">5</real>
            </apply>
            <apply xml:lang="zh_TW">
              <neg xml:lang="zh_TW" />
              <apply xml:lang="zh_TW">
                <nthRoot xml:lang="zh_TW" />
                <placeholder xml:lang="zh_TW" />
                <real xml:lang="zh_TW">5</real>
              </apply>
            </apply>
          </matrix>
        </symResult>
      </symEval>
    </define>
  </math>
</region>