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f(1)=−6
f(2)=−4
f(n)=f(n−2)+f(n−1)
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f(3)=f(3)=f, left parenthesis, 3, right parenthesis, equals

HURRY!!!!

Answer :

f(3) = f(3-2) + f(3-1)
f(3) = f(1) + f(2)

then substitute using the values given so
f(3) = -6 + -4
so f(3) = -10

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