considerando a funçao f(x)=5x ao quadrado +6 determine
alineonline:
determine o quê?
Soluções para a tarefa
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a)
f(x) = 5x² + 6
f(-4) = 5.(-4)² + 6
f(-4) = 5.16 + 6
f(-4) = 80 + 6
f(-4) = 86
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
f(3) = 5.3² + 6
f(3) = 5.9 + 6
f(3) = 45 + 6
f(3) = 51
****************************************
c)
f(6/5) = 5 .(6)² + 6
----
(5)²
f(6/5) = 5. 36 + 6
------
25
f(6/5) = 36 . 5 (:5) + 6
------
25 (:5)
f(6/5) = 1.36 + 6
------
5
f(6/5) = 36 + 6
------
5
f(6/5) = 36 + 30 66
-------------- = -----
5 5
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d)
f(√2) = 5.(√2)² + 6
f(√2) = 5.2 + 6
f(√2) = 10 + 6
f(√2) = 16
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
f(x) = 5x² + 6
f(-4) = 5.(-4)² + 6
f(-4) = 5.16 + 6
f(-4) = 80 + 6
f(-4) = 86
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
b)
f(3) = 5.3² + 6
f(3) = 5.9 + 6
f(3) = 45 + 6
f(3) = 51
****************************************
c)
f(6/5) = 5 .(6)² + 6
----
(5)²
f(6/5) = 5. 36 + 6
------
25
f(6/5) = 36 . 5 (:5) + 6
------
25 (:5)
f(6/5) = 1.36 + 6
------
5
f(6/5) = 36 + 6
------
5
f(6/5) = 36 + 30 66
-------------- = -----
5 5
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
d)
f(√2) = 5.(√2)² + 6
f(√2) = 5.2 + 6
f(√2) = 10 + 6
f(√2) = 16
¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨¨
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