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Exercitiile 2,3.multumesc!

Exercitiile 23multumesc class=

Răspuns :

MFM
2.
16x²=1+3+5+.....+2015  ⇒suma Gauss
nr termeni=(2015-1)/2+1=1008 
16x²=(1+2015)·1008/2
16x²=1008² 
x²=(1008/4)²
x²=252² |√
x1,2=+/- 252
3.
3(x-√2)²=(2√3-2√6)² |√
(x-√2)·√3=+/-(2√3-2√6) |√3
x-√2=+,-(2-2√2)
x1=√2-2+2√2=3√2-2
x2=√2+2-2√2=2-√2

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