Question

9º)Dada a função f(x)= y= 2x+3 com x,y e R, Calcule: f(2)+4.f(-2)-3.f(3)+f(1).

Answer 1

$Resolu\c{c} \~ao \to \left\{\begin{array}{ccc}f(x) = 2x+3 \to \left\{\begin{array}{ccc}f(2) = 2*2+3 = 7\\\\f(-2) = 2*(-2)+3 = -1\\\\f(3) = 2*3+3 = 9\\\\f(1) =2*1+3 = 5 \end{array}\right \\\\f(2)+4*f(-2)-3*f(3)+f(1) = \\\\7+4*(-1)-3*(9)+5 = \\\\7-4-27+5 = \\\\-19\end{array}\right$

Espero ter ajudado. =^.^=

Answer 2

f(x) = 2.x + 3

f(2) = 2.2. + 3 = 4 + 3 = 7
f(-2) = 2.(-2) + 3 = -4 + 3 = -1
f(3) = 2.3 + 3 = 6 + 3 = 9
f(1) = 2.1 + 3 = 2 + 3 = 5

f(2) + 4.f(-2) - 3.f(3) + f(1) = 7 + 4.(-1) - 3.9 + 5 = 7 - 4 - 27 + 5 = -19