000000000000000000000000cc7088ad5fcae3c927041256a50825aeaa630721cd9d56cec1b3fa1dec83 0
01 November 2023 22:00
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000000000000000000000000cc7088ad5fcae3c927041256a50825aeaa630721cd9d56cec1b3fa1dec83 0
01 November 2023 22:00
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Diket :u⁴=35 U15=20 Tentukan jumlah 20 suku pertama.
Diket :u⁴=35
U15=20
Tentukan jumlah 20 suku pertama.
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Iky I
01 November 2023 23:51
<p>A. 4 + 9 + 14</p><p><=> a = 4</p><p>b = 5</p><p>Sn = n / 2 * (2a + (n - 1) * b)</p><p>S * 20 = 20/2 * (2(4) + 19 * 5) )</p><p>S * 20 = 10(8 + 95)</p><p>S * 20 = 10 * 103</p><p>S * 20 = 1030</p><p>B. 38 + 28 + 18 +... <=> a = 38</p><p>b = - 10</p><p>S * 20 = 20/2 * (2(38) + 19(- 10))</p><p>S * 20 = 10(76 + (- 190))</p><p>S * 20 = 10(- 114)</p><p>S * 20 = - 1140</p><p>C. 3 + 7 + 11 +...</p><p><=> a = 3</p><p>b = 4<br><br>S * 20 = 20/2 * (2(3) + 19 * 4) )</p><p>S * 20 = 10(6 + 76)</p><p>S * 20 = 10(82)</p><p>S * 20 = 820</p><p>D. 35 + 31 + 27 +...</p><p><=> a = 35</p><p>b = - 4</p><p>S * 20 = 20/2 * (2(35) + 19(- 4)) )</p><p>S * 20 = 10(70 - 76)</p><p>S * 20 = 10(- 6)</p><p>S * 20 = - 60</p>
A. 4 + 9 + 14
<=> a = 4
b = 5
Sn = n / 2 * (2a + (n - 1) * b)
S * 20 = 20/2 * (2(4) + 19 * 5) )
S * 20 = 10(8 + 95)
S * 20 = 10 * 103
S * 20 = 1030
B. 38 + 28 + 18 +... <=> a = 38
b = - 10
S * 20 = 20/2 * (2(38) + 19(- 10))
S * 20 = 10(76 + (- 190))
S * 20 = 10(- 114)
S * 20 = - 1140
C. 3 + 7 + 11 +...
<=> a = 3
b = 4
S * 20 = 20/2 * (2(3) + 19 * 4) )
S * 20 = 10(6 + 76)
S * 20 = 10(82)
S * 20 = 820
D. 35 + 31 + 27 +...
<=> a = 35
b = - 4
S * 20 = 20/2 * (2(35) + 19(- 4)) )
S * 20 = 10(70 - 76)
S * 20 = 10(- 6)
S * 20 = - 60
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