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Thayethotho
@Thayethotho
December 2019
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Determine a geratriz dos seguintes decimais periodicos:
a) 0,222...
b) 0,555...
c) 0,1777...
d) 0,2333...
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TiagoEd
A) x = 0,222...
10x = 2 + 0,222...
10x = 2 + x
10-x = 2
9x = 2
x = 2/9
b) x = 0,555...
10x = 5,555...
10x = 5 + x
10x - x = 5
9x = 5
x = 5/9
c) x = 0,1777...
10x = 1,777...
10x = 1 + 7/9
10x = 16/9
90x = 16
x = 16/90
d) x = 0,2333...
10x = 2,333...
10x = 2 + 3/9
10x = 21/9
90x = 21
x = 21/90
2 votes
Thanks 2
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10x = 2 + 0,222...
10x = 2 + x
10-x = 2
9x = 2
x = 2/9
b) x = 0,555...
10x = 5,555...
10x = 5 + x
10x - x = 5
9x = 5
x = 5/9
c) x = 0,1777...
10x = 1,777...
10x = 1 + 7/9
10x = 16/9
90x = 16
x = 16/90
d) x = 0,2333...
10x = 2,333...
10x = 2 + 3/9
10x = 21/9
90x = 21
x = 21/90