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Matematica C3 – Algebra 1 - itis magistri cumacini

Matematica C3 – Algebra 1 - itis magistri cumacini

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www.matematicamente.it - <strong>Matematica</strong> C 3 – <strong>Algebra</strong> 1 – 6. <strong>Algebra</strong> di 1° gradoRisolvi e discuti le seguenti equazioni letterali nell'incognita x.92 12x=a1−2x x= a 4 ∀ a∈R93 2 x− 7 2 =a x−5 se a=2 I.S.∅ ; se {a≠2 I.S.= 32a−2}94 b 2 x=2 bb x se b=0 I.S.=R , b=1 I.S.∅ , b≠0∧b≠1 I.S.= {2b−1}95 a x x−2 a 2 −2 a x=096 ax2=x3 se a=1 I.S.=∅ ; se a≠1 I.S.={ a−1}197 3 a x−2 a= x⋅1−2 aa⋅ x−198 k x2=k 2 se k =0 I.S.=∅ ; se k ≠0 I.S.={ 2−kk }99 b1 x1=0 se b=−1 I.S.=R ; se b≠−1 I.S.={−1}100 k 2 x2k=x2 k =1 I.S.=R ; k=−1 I.S.=∅ ;k ≠1∧k ≠−1 I.S.={ k1}− 2101 x⋅3−5 a2⋅a−1=a−1⋅a1102 a−1 x1=x1 se a=2 I.S.=R ; se a≠2 I.S.={−1}103 x2 a⋅x− 2 a1=0104 a−1 x1=a−1 se a=1 I.S.=R ; se a≠1 I.S.={0}105 2k x1−2=k x2 se k=0 I.S.=∅ ; se k ≠0 I.S.={ 2 k }106 a a−1 x=2a x−5 se a=0 I.S.=R ; se a≠0 I.S.={ 3−a}10107 3axa=2a 2 −3a se a=0 I.S.=R ; se a≠0 I.S.={ 2 3 }⋅a−2108 3x−a=a x−36 se a=3 I.S.=R ; se a≠3 I.S.={2}109 22x=3axa−a 2 x a=2 I.S.=R ; a=1 I.S.=∅ ; a≠2∧a≠1 I.S.={ a−1}1110 xa 2 −4=a2 a=2 I.S.=∅; a=−2 I.S.=R ; a≠−2∧a≠2 I.S.={ a−2}1111 x−m xm= x1 x−1 m=1∨m=−1 I.S.=R ; m≠1∧m≠−1 I.S.=∅112 a−2 2 xa−2 xa−2=0 a=2 I.S.=R ; a=1 I.S.=∅ ; a≠1∧a≠2 I.S.={ 1−a}1113 9a 2 −4 x=2 x1 a=− 2 3 ∨ a= 2 3 I.S.=∅ ; a≠−2 3 ∧a≠ 2 3 {I.S.= 233a −2}2114 a−1 x=a 2 −1 se a=1 I.S.=R ; se a≠1 I.S.={a1 }115 a2 x=a 2 a−1 se a=−2 I.S.=∅ ; se a≠−2 I.S.={ a2 a−1a2 }116 a x−1 2 =a x 2 −12a se a=0 I.S.=R ; se a≠0 I.S.={0 }117 a 3 x−a 2 −4ax4=0 a=−2∨a=2 I.S.=R ;a=0 I.S.=∅ ;a≠−2∧a≠0∧a≠2 I.S.={ 1 a}118 bxb 2 1−bx−1b 2 −1=2b 2 se b=0 I.S.=∅ ; se b≠0 I.S.={ 1b22b }119 a a−5 xa a1=−6 x−1 a=2 I.S.=R ;a=3 I.S.=∅ ;a≠2∧a≠3 I.S.={ a33−a }120 xa 2 − x−a 2 a−4a4=a 2 a≠0 I.S.={ 4 a }; a=0 I.S.=∅296

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