Dik f(x)=x+3 dan g(x)=x^2-1ditanyaa.fog (x)b.gof (x)c.fof (x)d.gog (x)​

diketahui:

f(x)=x+3

g(x)=x² -1

ditanya:

a.fog (x)

b.gof (x)

c.fof (x)

d.gog (x)

jawab:

a) fog (x)

= f(x² -1)

= x² -1 +3

= x² +2 ✔️

b) gof (x)

= g(x +3)

= (x +3)² -1

= x² +6x +9 -1

= x² +6x +8 ✔️

c) fof (x)

= x+3 +3

= x +6 ✔️

d) gog (x)

= g(x² -1)

= (x² -1)² -1

= x⁴ -x² -x² +1 -1

= x⁴ -2x² ✔️

_______

semangat belajar….