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Answer 1 · 2018-04-24T18:28:52

#B. 54#

Here,

#color(red)(f(x)=7x-2#

#color(blue)(g(x)=x^3#

#color(violet)(h(x)=x^2-x#

Now,

#f(g(h(x)))=f(g(color(violet)(x^2-x))...to[color(violet)(h(x)=x^2-x)]#

#f(g(h(x)))=f((x^2-x)^color(blue)(3))...to[color(blue)(g(x)=x^3)]#

#f(g(h(x)))=color(red)7(x^2-x)^3-color(red)2...to[color(red)(f(x)=7x-2)]#

Take, #x=2#

#f(g(h(2)))=7(2^2-2)^3-2#

#f(g(h(x)))=7(2)^3-2=7xx8-2=56-2#

#f(g(h(x)))=54#