Respuesta :

Looks like the derivative of an integral,

[tex]\displaystyle\frac{\mathrm d}{\mathrm dx}\int_0^x\sqrt{1+a^3}\,\mathrm da[/tex]

Recall the fundamental theorem of calculus:

[tex]\displaystyle\frac{\mathrm d}{\mathrm dx}\int_c^{f(x)}g(u)\,\mathrm du=g(f(x))f'(x)[/tex]

where [tex]c[/tex] is some constant.

Directly applying the theorem here gives the derivative,

[tex]\boxed{\sqrt{1+x^3}}[/tex]

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