1.) IF f(x)=3x-5 and g(x)=x^2, find (fxg)(3)

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20-12-2017
Mathematics

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1.) IF f(x)=3x-5 and g(x)=x^2, find (fxg)(3)

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altavistard altavistard · Answer 1 · 2017-12-26T23:11:53+01:00

altavistard altavistard

26-12-2017

Please use * to denote mult. here, not "x." "x" is your variable and cannnot also be a symbol for mult.

f(x)g(x) = 3x^3 - 5x^2.

Now let x = 3:

(f*g)(3) = 3(3)^3 - 5(3)^2 = 81-45 = 36 (answer)

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