F(x)=1-x^2 Tentukan a. f(a/2) b. f(a)

f(x) = 1 - x²
maka 
a) f(a/2) = 1 - a² /2²
f(a/2)= 1 - a²/4
f(a/2) = [tex] \frac{4-a²}{4} [/tex]
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b) f(a) =  1 - a²