Tolong dong bantuin aku please🙏

<p>diketahui :&nbsp;</p><p>U₄ = 17</p><p>U₉ = 37</p><p>&nbsp;</p><p>ditanyakan :&nbsp;</p><p>U₁₀?</p><p>&nbsp;</p><p>jawab :</p><p>_{a + 3b = 17}</p><p>_{a + 8b = 37}</p><p>___________ -</p><p>&nbsp; &nbsp; -5b = -20</p><p>&nbsp; &nbsp; &nbsp; &nbsp; b = -20/-5</p><p>&nbsp; &nbsp; &nbsp; &nbsp; b = 4</p><p>&nbsp;</p><p>substitusikan b = 4 ke salah satu persamaan</p><p>a + 3b = 17</p><p>a + 3(4) = 17</p><p>a + 12 = 17</p><p>a = 17 - 12</p><p>a = 5</p><p>&nbsp;</p><p>U₁₀= a + 9b</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 5 + 9 (4)</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 5 + 36</p><p>&nbsp; &nbsp; &nbsp; &nbsp;= 41</p><p>&nbsp;</p><p>jadi, suku ke-10 dari barisan tersebut adalah 41</p>