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Verified answer
A) Lima Suku PertamaUn = n² + 1
U1 = 1² + 1
U1 = 1 + 1
U1 = 2
Un = n² + 1
U2 = 2² + 1
U2 = 4 + 1
U2 = 5
Un = n² + 1
U3 = 3² + 1
U3 = 9 + 1
U3 = 10
Un = n² + 1
U4 = 4² + 1
U4 = 16 + 1
U4 = 17
Un = n² + 1
Un = 5² + 1
Un = 25 + 1
Un = 26
Jadi, jumlah 5 suku adalah 2 + 5 + 10 + 17 + 26 = 60
B) U3 + U7
Un = n² + 1
U3 = 3² + 1
U3 = 9 + 1
U3 = 10
Un = n² + 1
U7 = 7² + 1
U7 = 49 + 1
U7 = 50
Jadi, U3 + U7 = 10 + 50 = 60
3) U10 - U5
Un = n² + 1
U10 = 10² + 1
U10 = 100 + 1
U10 = 101
Un = n² + 1
U5 = 5² + 1
U5 = 25 + 1
U5 = 26
Jadi, U10 - U5 = 101 - 26 = 75
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