Question

Maret's

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Date:
Tentukan rumus Suku ken dan Suku ka 5o dari bari San
bilangan
An 27,24.21...
2 -1,3,7,11,..

Answer 1

amalevin

1. Un = a - (n-1).b

U50 = 27 - (50-1.)4

= 27 - 196

= -169

2. a = -1

b=3-(-1) = 4

Sn = n/2 (2a + (n-1)b)

S50=50/2 ( 2(-1) + (50-1)4)

S50 = 25 (-2+ 196 )

S50 = 25 (194)

S50 = 4850

Maret's

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