Bantu jawab yha kak😁

<p>Halo, Azhar M! Penyelesaian soal limit tersebut dengan cara mensubstitusikan nilai x, yaa. Yuk, simak pembahasan berikut.</p><p>&nbsp;</p><p>(a)</p><p>&nbsp;lim &nbsp; &nbsp; &nbsp; &nbsp; (x² - 8x + a ) = 18</p><p>x --&gt; -1 &nbsp;</p><p>&lt;=&gt; (-1)² - 8(-1) + a = 18</p><p>&lt;=&gt; &nbsp; &nbsp; &nbsp; &nbsp; 1 + 8 + a &nbsp; &nbsp; = 18</p><p>&lt;=&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;9 + a &nbsp; &nbsp; &nbsp; = 18</p><p>&lt;=&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; a &nbsp; &nbsp; = 18 -9</p><p>&lt;=&gt; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; a &nbsp; &nbsp; = 9</p><p>&nbsp;</p><p>(b)</p><p>lim &nbsp; &nbsp; &nbsp; &nbsp; (3x - a ) / (4x² - 2√x ) = 4</p><p>x --&gt; 1 &nbsp;</p><p>&lt;=&gt; (3.1 - a) / (4.1² - 2√1) = 4</p><p>&lt;=&gt; (3 - a) / (4 - 2) = 4</p><p>&lt;=&gt; (3 - a) / 2 = 4</p><p>&lt;=&gt; 3 - a = 8 &nbsp; &nbsp;&nbsp;<i>(8 itu dari 2 yang pindah ruas, ya, sehingga 4 . 2 = 8)</i></p><p><i>&lt;=&gt; </i>- a = 8 - 3</p><p>&lt;=&gt; -a = 5 &nbsp; &nbsp;<i>(masing-masing kita kalikan dengan -1 ya untuk menghilangkan tanda negatif pada huruf a)</i></p><p>&lt;=&gt; a = -5</p><p>&nbsp;</p><p>(c)</p><p>lim &nbsp; &nbsp; &nbsp; &nbsp; (2x - 6) / (8-x) = 4 / 3</p><p>x --&gt; a</p><p><i>(kita kalikan silang yaaa)</i></p><p><i>&lt;=&gt; </i>3(2x - 6) = 4(8 - x)</p><p>&lt;=&gt; 6x - 18 = 32 - 4x</p><p>&lt;=&gt; 6x + 4x = 32 + 18</p><p>&lt;=&gt; 10x = 50</p><p>&lt;=&gt; x = 50 / 10</p><p>&lt;=&gt; x = 5 &nbsp; (jadi, nilai a nya adalah 5)</p><p>&nbsp;</p><p><i>semoga membantu :)</i></p><p>&nbsp;</p>