Question

No 3,4,5,6 apaa plisss tolong dijawab

Answer 1

5 ) u5 = a+ 4b = 19
    u8 = a+ 7b = 31
dikurangi
3b = 12
b = 4

u5 = a+4b = 19
a + 4dikali4 = 19
a= 19-16
a = 3
sn = ( 2 dikali a + (n-1)b)
= ( 2dikali 3 = 19dikali4)
=10 (4+76)
820

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