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daviddezontini
@daviddezontini
July 2022
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Seja a função IR →IR, definida por f(x) = ax + b, com a, b € IR. Sabendo que f(-3) = -11 e f(2) = -1, determine a e b , escreva a função e calcule f(1/2).
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3478elc
Verified answer
f(-3) = -11 e f(2) = -1, determine a e b , escreva a função e calcule f(1/2).
-3a + b = - 11(-1)
2a + b = - 1
3a - b = 11(-1)
2a + b = - 1
5a = 10
a = 2
y = ax + b
2.2 + b = - 1 ==> b = - 1- 4 ==> b = - 5
y = 2x - 5
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daviddezontini
onde está calcule f(1/2)
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Verified answer
f(-3) = -11 e f(2) = -1, determine a e b , escreva a função e calcule f(1/2). -3a + b = - 11(-1)
2a + b = - 1
3a - b = 11(-1)
2a + b = - 1
5a = 10
a = 2
y = ax + b
2.2 + b = - 1 ==> b = - 1- 4 ==> b = - 5
y = 2x - 5