dau coroana,multumesc frumos
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Răspuns:
Explicație pas cu pas:
1) N = log(4; 12*3/72) = log(4; 1/2) =
log(2; 1/2)*1/log(2; 4) = -1/2
2) 2a -1 > 0, 2a >1, a > 1/2
3) 2^(x^2 +1) = 2^2
x^2 +1 = 2
x^2 = 1, x = -+ 1