U2=2 dan U10=8 tentukan U5=?

Penjelasan dengan langkah-langkah:

U2 = 2

U10 = 8

U5 = …?

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a + 9b = 8

a + b = 2

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8b = 6

b = 6/8

b = 3/4

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a + b = 2

a + 3/4 = 2

4a/4 + 3/4 = 2

4a + 3 = 8

4a = 5

a = 5/4

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U5 = a + 4b

U5 = 5/4 + 4 (3/4)

U5 = 5/4 + 3

U5 = 5/4 + 12/4

U5 = 17/4

U5 = 4 1/4