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2014-01-22T18:40:50+02:00
A²+1/a²=7
a²+1=7a²
7a²-a²-1=0
6a²-1=0
Δ=0+24=24
a1=-2√6/12=-√6/6⇒S1=(-√6/6+1)/-√6/6=(-√6+6)/6*(-6)/√6=(6-√6)/√6(rationalizam)⇒
⇒S1=(6√6-6)/6=6(√6-1)/6⇒S1=√6-1

a2=2√6/12=√6/6⇒S2=1-√6