bhagrathikhadka56
bhagrathikhadka56 bhagrathikhadka56
  • 15-08-2021
  • Mathematics
contestada

if f(x+1)=3x+4,find f(x) and f(3).​

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Аноним Аноним
  • 15-08-2021

f(x+1)=3x+4

  • Let y be x+1
  • So x=y-1

[tex]\\ \sf\longmapsto f(y)=3(y-1)+4[/tex]

[tex]\\ \sf\longmapsto f(y)=3y-3+4[/tex]

[tex]\\ \sf\longmapsto f(y)=3y+1[/tex]

[tex]\\ \sf\longmapsto f(x)=3x+1\checkmark[/tex]

[tex]\\ \sf\longmapsto f(3)[/tex]

[tex]\\ \sf\longmapsto 3(3)+1[/tex]

[tex]\\ \sf\longmapsto 9+1[/tex]

[tex]\\ \sf\longmapsto 10[/tex]

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