Question 377688
The first two are correct but could be simplified.
a) {{{df/dx=3*cos(3x-1)}}}
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b) {{{df/dx=(2x^3)/sqrt(x^4+1)}}}
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c) Use the quotient rule,
{{{df/dx=((x+1)^3*1-(x)(3(x+1)^2))/((x+1)^3)^2}}}
{{{df/dx=(x+1-3x)/(x+1)^4}}}
{{{df/dx=(1-2x)/(1+x)^4}}}
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d){{{df/dx=(sec(x^2+2))^2*(2x)}}}
{{{df/dx=2x*(sec(x^2+2))^2}}}