Question

4. Dadas as funções, f(x) = 2x +12, g(x) = −2x +5. O valor de f(−1) + g(2) é:
a) 8 b) 9 c) 10 d) 11 e) 12

Answer 1

$f(x) = 2x +12\\g(x) = -2x +5\\\\f(-1) = 2*(-1) + 12\\f(-1) = -2 + 12\\f(-1) = 10\\\\g(2) = -2*2+5\\g(2) = -4 + 5\\g(2) = 1\\\\f(-1) + g(2) = 10 + 1 = 11\\\\ d) \ 11$