anonymous
  • anonymous
let f(x) =3x^3 -5x^2+4x-6 and g(x) = -8x^2-7x +12,evaluate (f.g)(1/2) a.13/8 b.13/6 c.-13/4 d.-13/8
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
lag dont lag this is 2nd to the last question
anonymous
  • anonymous
im getting error now when it comes to 4x-6 short term memory
anonymous
  • anonymous
13/6 letter b

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anonymous
  • anonymous
ops w8 wrong theres 1/2
anonymous
  • anonymous
13/6 sir?
anonymous
  • anonymous
\[27x-10x+4x =13 16x-7=9 then 9-12=-3 -6-3 =3 f.g(13/3) (1/2)=13/6\]
anonymous
  • anonymous
ops wrong 1316x =only 13x then 16x-7
anonymous
  • anonymous
is it b or d
anonymous
  • anonymous
what is your answer sir?
ash2326
  • ash2326
we have to find f.g(1/2) let's find f(x).g(x) \[f(x).g(x)=(3x^3-5x^2+4x-6)(-8x^2-7x+12)\] substitute x=1/2 \[f.g(1/2)=(3/8-5/4+4/2-6)(-8/4-7/2+12)\] on solving we get f.g(1/2)=-507/16 not matching any option sorry i'd to go somehere in the middle
ash2326
  • ash2326
*somewhere
anonymous
  • anonymous
it will be (-8x-7x)^2 = 8
anonymous
  • anonymous
-8 or 8
ash2326
  • ash2326
how 'd you get this?
anonymous
  • anonymous
im checking my notebook example of my prof XD its not finalized XD
anonymous
  • anonymous
sqrt of 507 = 13sqrt3
anonymous
  • anonymous
letter D final not sure

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