Question

f: R->R, f(x)= x^n, n apartine lui N cu proprietatea ca f(3)=27. Sa se calculeze f(2^2)-f(2)

Answer 1

F: R->R, f(x)= x^n, n ∈ N
f(3)=27
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Sa se calculeze f(2^2)-f(2)
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f(3)=27
f(3)=3^n=3^3=27 => n=3
=> f(4)=4^3
=>f(2)=2^3
=> 4^3-2^3=64-8=56