Question

tolong ya ka nomer 2

Answer 1

a)

a = 1

b = 4 - 1

.. = 3

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Un = a + (n - 1)b

..... = 1 + (n - 1)(3)

..... = 1 + 3n - 3

..... = 3n - 2

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U8 = 3(8) - 2

..... = 24 - 2

..... = 22

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b)

a = 16

r = 8 / 16

. = 1 / 2

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Un = arⁿ ⁻ ¹

.....= 16(1 / 2)ⁿ ⁻ ¹

..... = 2⁴(2 ⁻¹)ⁿ ⁻ ¹

..... = 2⁴(2 ⁻ ⁿ ⁺ ¹)

..... = 2 ⁻ ⁿ ⁺ ¹ ⁺ ⁴

..... = 2⁵ ⁻ ⁿ

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U8 = 2⁵ ⁻ ⁸

..... = 2 ⁻³

..... = 1 / 2³

..... = 1 / 8

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c)

1,3,7,13,... ..

\/ \/ \/

2 4 6

\/ \/

2 2

.

a = 1

b = 2

c = 2

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2A = c

A = 2 / 2

A = 1

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3A + B = b

3(1) + B = 2

..........B = 2 - 3

..........B = -1

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A + B + C = a

...1 - 1 + C = 1

..............C = 1

.

Un = An² + Bn + C

..... = (1)n² + ( -1)n + 1

..... = n² - n + 1

..... = n(n - 1) + 1

.

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.

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// tanda . (titik) adalah spasi //

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soal serupa dapat kk lihat di:

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brainly.co.id/tugas/9982402

brainly.co.id/tugas/9889682

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kategorisasi

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Pelajaran.... :Matematika

Kelas........... : 9

Bab.............. : 6

Nama Bab.. : Barisan dan Deret Bilangan

kata kunci.. : barisan,deret

Kode mapel :2

Kode............ :9.2.6

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