Răspuns:
m = 1/2
Explicație pas cu pas:
f : R --> R ; f(x) = x²+m
f(0) ; f(1) ; f(2) termeni consecutivi ai unei progresii geometrice
f(0) = m ; f(1) = m+1 ; f(2) = m+4
m+1 = mq
m+4 = (m+1)q = mq + q = m+1 + q =>
q = 3 =>
m+1 = 3m => 2m = 1 => m = 1/2
1/2+4 = (1/2+1)·3 <=> 9/2 = 9/2 ; corect
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