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<p>Hasil kali 5 suku pertama</p><p>=&gt; a (ar)(ar²)(ar³)(ar⁴) = 32</p><p>=&gt; a⁵r¹⁰ = 32</p><p>=&gt; (ar²)⁵ = 2⁵</p><p>=&gt; ar² = 2</p><p>Jumlah suku ke 3 dan suku ke 4</p><p>=&gt; (ar²) + &nbsp;(ar³) = 24</p><p>=&gt; ar² (1+r) = 24</p><p>=&gt; 2 (1+r) = 24</p><p>=&gt; 1+r = 12</p><p>=&gt; <strong>r = 11</strong></p><p>Substitusi r = 11 ke ar² = 2</p><p>=&gt; a(11)² = 2</p><p>=&gt; <strong>a = 2/11²</strong></p><p>Maka suku ke 7</p><p>U₇ = ar⁶ = 2/11² (11)⁶ = <strong>2(11)⁴</strong></p>