6. a. Un = 5 + (n - 1) 3
= 5 + 3n - 3
= 3n + 2
U10 = 3 (10) + 2
= 32
b. Un = 28 + (n - 1) 2
= 28 + 2n - 2
= 26 - 2n
U10 = 26 - 2 (10)
= 6
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6. a. Un = 5 + (n - 1) 3
= 5 + 3n - 3
= 3n + 2
U10 = 3 (10) + 2
= 32
b. Un = 28 + (n - 1) 2
= 28 + 2n - 2
= 26 - 2n
U10 = 26 - 2 (10)
= 6