Matematica C3 – Algebra 1 - itis magistri cumacini

www.matematicamente.it - Matematica C 3 – Algebra 1 – 6. Algebra di 1° grado1453x1 = 2a−1{a= 1 2 I.S.=∅a≠ 1 2 { I.S.= −2a−2 2a−1 }146 2a−xx−3 − ax29−3x =0147 t−1x−2 =2t148kx1 = 2kx−1149 a−1x3 − a2−x = axa2x 2 x−6150 a1x1 − 2ax−2 =3−5ax 2 −x−2151 x−ax 2 −1 − x3a2x−x 2 −1 = x5x1 − 2x x−1 2−1{a=3∨a= 7 9 I.S.=∅a≠3∧a≠ 7 9I.S.= { 23a13−a }{t=0∨t=1 I.S.=∅t≠0∧t≠1 I.S.={ 5t−12t }k=0 I.S.=R−{1,−1}{ k≠0 I.S.={−3}{a=1 I.S.=R−{−3,2}a=3∨a=2 I.S.=∅a≠1∧a≠3 I.S.={−a}{a=1∨a=−3∨a=3 I.S.=∅a≠−3∧a≠1∧a≠3 I.S.={ 5−a1−a }{a=1∨a=−5∨a=−1∨a=7 I.S.=∅a≠−5∧a≠−1∧a≠7 I.S.={ 2a−1a5 }152153313x a3x−1 = a−5x1−9x 22ax 2 −x−2 13x 2 2x−1 = 6a2 −13a−43x 3 −4x 2 −5x2{a=− 4 3 ∨a=5 9 ∨a=13 3a≠− 4 3 ∧a≠5 9 ∧a≠13 3I.S.=∅I.S.={ 3−2a43a }{a=− 1 6 { I.S.=R− −1,2 ,1 3 }a= 7 ∨a=4∨a=1 I.S.=∅3a≠− 1 6 ∧a≠7 ∧a≠4∧a≠1 I.S.={a−2}3154 a x = 1 a=0equaz. priva di significatoa { a≠0 I.S.={a 2 }155156axa =1axx−a 1xa =1157 xax−a = x−axa21581−ax 12ax =0{a=−1∨a=0 I.S.=∅a≠−1∧a≠0 I.S.={ − a 21a }{a=−1∨a=0 I.S.=∅a≠−1∧a≠0 I.S.={ }}−aa−1 a1a=0 I.S.=R−{0}{ a≠0 I.S.={0}{a=0 I.S.=∅a≠0 I.S.={ −5 a }1592x−2 a1a−1 =0{a=1 equaz. priva di significatoa=−1 I.S.=∅a≠1∧a≠−1 I.S.={ 4 a1 }302