দেওয়া আছে, fx=x2+3x+1 এবং gx=2x-3
∴fogx=f2x-3=2x-32+32x-3+1
=4x2-6x+1 Ans.
এবং fof(x)=fx2+3x+1
=x2+3x+12+3x2+3x+1+1
=x4+6x3+14x2+15x+5 Ans.
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