nmeehleib nmeehleib

21-11-2016
Mathematics

contestada

if f(x)=-4x^2 + 5x and if g(x)=2x^2 what is (f ○ g) (4)

*I remember my teacher saying the open circle does not mean multiply?

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tibboyz123 tibboyz123

21-11-2016

Find g(4) first,
g(4) = 2(4)² = 2(16) = 32

f(g(4)) = f(32) = -4(32)² + 5(32) =-4(1024) + 160 = -4096+160 = -3936
Hence, (f(g(4))) is -3936

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