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MateusCZJ
@MateusCZJ
November 2019
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A (D) da 11 e
a 12 !!!!
Por favor !!!
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SamuelTioPit
11.
d)-5^2x-5 = 1/125
5^2x-5 = 1/5^3
5^2x-5 = 5^-3
2x-5 = -3
2x = 2
x = 1
12.
2^x²-3x+2=1
2^x²-3x+2=2^0
x²-3x+2 = 0
Δ = (-3)² - 4*1*2
Δ = 9 - 8 = 1
x = (-(-3) +- √1)/(2*1)
x = (3 +- 1)/2
x1 = (3+1)/2 = 2
x2 = (3-1)/2 = 1
letra "a"
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Lista de comentários
d)-5^2x-5 = 1/125
5^2x-5 = 1/5^3
5^2x-5 = 5^-3
2x-5 = -3
2x = 2
x = 1
12.
2^x²-3x+2=1
2^x²-3x+2=2^0
x²-3x+2 = 0
Δ = (-3)² - 4*1*2
Δ = 9 - 8 = 1
x = (-(-3) +- √1)/(2*1)
x = (3 +- 1)/2
x1 = (3+1)/2 = 2
x2 = (3-1)/2 = 1
letra "a"