Question

suku ke-80 dari barisan aritmatika 2,4,6,8, adalah

Answer 1

jwb

Un = a + (n - 1)d

a = 2

d = 2

n = 80

U80 = 2 + (80 - 1)2

= 2 + 79 x 2

= 2 + 158

= 160

suku ke-80 dri barisan aritmatika 2,4,6,8 = 160

Answer 2

•°• Suku ke-80 dri barisan aritmatika 2,4,6,8... adlh [tex]\underline{\boxed{\red{\bf{160}}}}[/tex]

[tex] \\ \\ [/tex]

Penjelasan dengan langkah-langkah:

Setiap bilangan bertambah 2 dri bilangan sebelumnya

• n = 80
• a = 2
• b = 4 - 2 = 2
• Suku ke-80 = ?

[tex] \: \\ [/tex]

Rumus

• [tex]\color{magenta}{\boxed{\sf{U_{n} = a + (n - 1)b}}}[/tex]

[tex] \: [/tex]

[tex] \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \colorbox{yellow}{ \sf{Suku Ke-80}}[/tex]

[tex]\sf{U_{n}}[/tex] = [tex]\sf{a + (n - 1)b}[/tex]

[tex]\sf{U_{80}}[/tex] = [tex]\sf{2 + (80 - 1)2}[/tex]

[tex]\sf{U_{80}}[/tex] = [tex]\sf{2 + 79.2}[/tex]

[tex]\sf{U_{80}}[/tex] = [tex]\sf{2 + 158}[/tex]

[tex]\sf{U_{80}}[/tex] = [tex]\underline{\boxed{\red{\bf{160}}}}[/tex]

[tex] \\ \\ [/tex]

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[tex] \: [/tex]

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