Mencari (f o g)(x)

<p>Dik : f(x) = x²+2x-1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; g(x) = 2x+2</p><p>Dit : (fog)(x) = ?</p><p>Dij : (fog)(x) = f(g(x))</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = f(2x+2) &nbsp; &nbsp;-&gt; masukkan fungsi g</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = (2x+2)²+2(2x+2)-1 &nbsp; -&gt; anggap g sebagai x pada fungsi f</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 4x²+8x+4+4x+4-1</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; = 4x²+12x+7&nbsp;</p><p>&nbsp;</p><p>Jadi, hasil (fog)(x) adalah 4x²+12x+7</p><p>Semoga membantu, tetap semangat (⁠ ⁠╹⁠▽⁠╹⁠ ⁠)</p>