for part 2a) you can take the antiderivative of f(x) from 1 to 4
2b)
f(x)=6x-e[tex]^{1-2x}[/tex]
f'(x)=6-e[tex]^{1-2x}[/tex](-2)
f'(x)=6+2e[tex]^{1-2x}[/tex]
f''(x)=2e[tex]^{1-2x}[/tex](-2)
f''(x)=-4e[tex]^{1-2x}[/tex]
f''(x)+2f'(x)=0
-4e[tex]^{1-2x}[/tex]+2[6+2e[tex]^{1-2x}[/tex]]-12=0
-4e[tex]^{1-2x}[/tex]+12+4e[tex]^{1-2x}[/tex]-12=0
0=0
OWNED!