Tolong bantu jawab diketahui fungsi f(x)=2x+3 dan g(x)=x-6, berapakah hasil dari (f.g)(4)?

<p>Halo, Najwa! Sebelumnya aku mau tanya nihh, (f.g) yang dimaksud itu <strong>f dikali g </strong>atau <strong>f bundaran g </strong>yaa?</p><p>&nbsp;</p><ul><li><strong>Kalau (f.g)(4) dalam artian dikali —&gt; (f.g)(4) :</strong></li></ul><p>ㅤ(f.g)(x) = f(x) . g(x)</p><p>&nbsp; &nbsp;ㅤ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= (2x + 3) . (x - 6)</p><p>&nbsp; &nbsp;ㅤ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 2x² - 12x + 3x - 18</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ㅤ = 2x² - 9x - 18</p><p>ㅤ(f.g)(4) = 2(4)² - 9(4) - 18</p><p>&nbsp; &nbsp;ㅤ &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;= 2.16 - 36 - 18</p><p>&nbsp; &nbsp;ㅤㅤㅤ &nbsp;= 32 - 36 - 18</p><p>&nbsp; &nbsp;ㅤㅤㅤ &nbsp;= -22</p><p>&nbsp;</p><ul><li><strong>Sedangkan, kalau (f.g)(4) dalam artian bundaran —&gt; (f o g)(4) :</strong></li></ul><p>ㅤ(f o g)(x) = f(g(x))</p><p>&nbsp; &nbsp;ㅤㅤㅤㅤ &nbsp;= f(x-6)</p><p>&nbsp; &nbsp;ㅤㅤㅤㅤ &nbsp;= 2(x-6) + 3</p><p>&nbsp; &nbsp;ㅤㅤㅤㅤ &nbsp;= 2x - 12 + 3</p><p>&nbsp; &nbsp;ㅤㅤㅤㅤ &nbsp;= 2x - 9</p><p>ㅤ(f o g)(4) = 2(4) - 9</p><p>&nbsp; &nbsp;ㅤㅤㅤㅤ &nbsp;= 8 - 9</p><p>&nbsp; &nbsp;ㅤㅤㅤ ㅤ = -1</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p><p>&nbsp;</p>