Erwin Harahap

do Now or Never

Jumlah 3 bilangan bulat berurutan

Posted by Erwin on September 8, 2015

Jumlah tiga bilangan bulat berurutan diketahui -12. Tentukan bilangan bilangan tersebut

Jawab:

x1 + x2 + x3 = -12

Karena bilangan berurutan, maka:

(x-1) + x + (x+1) = -12
x – 1 + x + x + 1 = -12
3x = -12
x = -4

maka,

x1 = x – 1 = -4 – 1 = -5
x2 = x = -4
x3 = x + 1 = -4 + 1 = -3

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