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Verified answer
Kelas 8 MatematikaBab Barisan dan Deret Bilangan
b = U2 - U1
b = 50 - 90
b = -40
Un = a + (n - 1) . b
Un = 90 + (n - 1) . (-40)
Un = 90 - 40n + 40
Un = 130 - 40n
Verified answer
A = 90 b = 50-90 = -40Un = a + (n-1) b
= 90 + (n-1) (-40)
Un = 90 - 40n + 40
Un = 130 - 40n / Un = 40n + 130)
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