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2. U10 = a + (n-1) b
= 16 + (10-1) 3
= 16 + 9 X 3
= 16 + 27
= 43
U25 = a + (n-1) b
= 16 + (25-1) 3
= 16 + 24 X 3
= 16 + 72
= 88
3. 512
= √25.3 - √36.2
= 5√3 - 6√2 = 5b - 6a
2. a. Un = a + (n-1)b
U10 = 16 + (10-1)3
= 43
b. U25 = 16 + ( 25-1)3
= 98
3. U7 = a + (n-1)b
= 8 + (7-1)8
= 56
4. U2 = 10 ⇒ a +b =10
U8= 28 ⇒ a + 7b = 28.. di buat persamaan
= b = 3 ,a=7
U60 = a+(n-1)b
= 7+(60-1)3
=184
5.maaf no 5 gak dikerjain. saya lupa , jd ragu jawab