suppose function f,g,h and l are defined as follow:f(x)=4xsquared-5x+1,g(x)=-1/2x-3,h(x)=squared root(2-x)squared+1/2x,l(x)=square root2-x-3.
.write down Df and solve inequality f(x)<0
.write down Dg and solve 4g(x)=8
.write down Dh,Dg+h and solve the (g+h)(x)=0
.write down Dg.l without first calculating(g.l)(x)
.write down Dl/g without first calculating l/g(x)

i need help pls

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