a
Un = n² + 4n + 10
U3 = 3² + 4(3) + 10
U3 = 9 + 12 + 10
U3 = 31
b
U5 = 5² + 4(5) + 10
U5 = 25 + 20 + 10
U5 = 55
c
U3+U5 = 31+55 = 86
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a
Un = n² + 4n + 10
U3 = 3² + 4(3) + 10
U3 = 9 + 12 + 10
U3 = 31
b
Un = n² + 4n + 10
U5 = 5² + 4(5) + 10
U5 = 25 + 20 + 10
U5 = 55
c
U3+U5 = 31+55 = 86