Question and Answers Forum

All Questions      Topic List

Algebra Questions

Previous in All Question      Next in All Question      

Previous in Algebra      Next in Algebra      

Question Number 201200 by Calculusboy last updated on 01/Dec/23

Commented by Rasheed.Sindhi last updated on 02/Dec/23

( (x−1)^(x−1)  )^(1/3) =(x−1)^((x−1)^(1/3) )

((x1)x1)1/3=(x1)(x1)1/3

Commented by Rasheed.Sindhi last updated on 02/Dec/23

Symmetry in above question!

Symmetryinabovequestion!

Answered by cortano12 last updated on 02/Dec/23

 (x−1)^((x−1)/3)  = (x−1)^((x−1))^(1/3)   ; x≠1   (1) x−1=−1⇒x=0  (2) x−1=1⇒x=2   (3) ((x−1)/3) =((x−1))^(1/3) ⇒(x−1)=3(x−1)^(1/3)     (x−1)^(1/3)  ((x−1)^(2/3) −3)=0    (x−1)^(2/3) = 3⇒(x−1)^2 =27     x= 1±3(√3)

(x1)x13=(x1)x13;x1(1)x1=1x=0(2)x1=1x=2(3)x13=x13(x1)=3(x1)1/3(x1)1/3((x1)2/33)=0(x1)2/3=3(x1)2=27x=1±33

Commented by Calculusboy last updated on 02/Dec/23

thanks sir

thankssir

Answered by esmaeil last updated on 02/Dec/23

((x−1)/3)ln(x−1)=((x−1))^(1/3) ln(x−1)→^(x−1=u)   u=3(u)^(1/3) → { ((x=1)),((x=1±3(√3))) :}

x13ln(x1)=x13ln(x1)x1=uu=3u3{x=1x=1±33

Commented by Calculusboy last updated on 02/Dec/23

thanks

thanks

Answered by Rasheed.Sindhi last updated on 02/Dec/23

(x−1)^((x−1)/3) =(x−1)^((x−1)^(1/3) )   (x−1)^(((x−1)/3)−(x−1)^(1/3) ) =1=(x−1)^0    { ((x−1=1⇒x=2✓)),((x−1=−1⇒x=0✓)),((((x−1)/3)−(x−1)^(1/3) =0)) :}  ((x−1−3(x−1)^(1/3) )/3)=0  x−1=3(x−1)^(1/3)   (x−1)^3 =27(x−1)  (x−1)^3 −27(x−1)=0  (x−1)( (x−1)^2 −27)=0  x≠1⇒  x−1=±3(√3) ⇒x=1±3(√3)  ✓

(x1)x13=(x1)(x1)1/3(x1)x13(x1)1/3=1=(x1)0{x1=1x=2x1=1x=0x13(x1)1/3=0x13(x1)1/33=0x1=3(x1)1/3(x1)3=27(x1)(x1)327(x1)=0(x1)((x1)227)=0x1x1=±33x=1±33

Commented by Calculusboy last updated on 02/Dec/23

nice solution

nicesolution

Terms of Service

Privacy Policy

Contact: info@tinkutara.com