Makkkyy6
Makkkyy6
23-02-2017
Mathematics
contestada
Please help me! Thanks!
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ChandrikaP
ChandrikaP
23-02-2017
answer is 9
A(x)=f(b)-f(a)/b-a
where a=-10 b=10
f(x)= x^2+9x+18
f(a)=(-10)^2-90+18=28
f(b)=208
A(x)=208-28/10+10
A(x)=180/20=9
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