111.
f(x)+g(x)=2⋅3x
f(x)−g(x)=2⋅3−x
[f(x)]2−[g(x)]2=4
[f(x)]2+[g(x)]2=2(32x+3−2x)
115. y=ex→y=ex−1→y=e2x−1→y=3e2x−1
117. y=ex→y=e2+x→y=e2+3x→y=5e2+3x→y=5e2−3x→y=5e2−3x+4
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