4.Punkt P=(2,16)należy do wkresu funkcji .Czy Q też należy do wykresu funkcji;
a)Q=(\frac{1}{2},{2})
b)Q=(5,1024)
C)Q=
d)Q=
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f(x) = a^ x
P = ( 2 ; 16)
a^2 = 16
a = 4
====
zatem f(x) = 4^x
a) Q = ( 1/2 ; 2)
f(1/2) = 4 ^(1/2) = p(4) = 2
Tak
b) Q = (5 ; 1024)
f(5) = 4^5 = 1024
Tak
c)
Q = (-3; 1/16)
f(-3) = 4^(-3) = 1/( 4^3) = 1/64
Nie
d) Q = (- 1/4 ; p(2)/2 )
f( - 1/4) = 4 ^(-1/4) = 1/ ( 4 ^(1/4)) = 1/p(2) = p(2)/2
Tak
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