$$\( \mathrm{f}(x)=2 x-1 \quad \mathrm{~g}(x)=x^{2}+2 x \quad \mathrm{~h}(x)=4^{x} \quad \mathrm{j}(x)=2^{x}\)$$ Find the value of $$\(\operatorname{fh}(3)\)$$. .............................................
Exam No：0580_w21_qp_43 Year：2021 Question No：11(a)(ii)
Answer:
127
Knowledge points:
E2.9.1 Use function notation, e.g. f(x)=3x-5, f:x↦3x-5, to describe simple functions.
E2.9.3 Form composite functions as defined by gf(x)=g(f(x)).
Solution:
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