Cho hàm số \(y=f(x)\) có bảng biến thiên sau:
Câu hỏi: Cho hàm số \(y=f(x)\) có bảng biến thiên sau:![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAagAAAB2CAYAAACd8QcrAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAOJ0lEQVR4nO3dP2za6B8G8Mc/deC2bMdNpRIQipBKp+NgaLaGZIinpp1Ql/huIkuGkyL1BqQbMhzeDpYe0yVZzjckzk11h3Bkc6UIOeCB2xgZvfk3BDvQ/GmSGvwnz0dCCuk1ea/G7+P369fvK9i2bYOIiChg/ud3A4iIiK7CgCIiokBiQBERUSAxoIiIKJBCHVCCIPjdBCIimpFQBxQREUUXA4qIiAKJAUVERIHEgCIiokBiQBERUSAxoIjIP6oEQRDOX5Lqd2soYBhQFH2mjJJQgmz63RCapkJSRNi2Dds+xEZzBcwomuRZQJlyCYIgoCSbAEyoUglCSQb7BPKVKkFIbaLtdzvoMjOFrUZ5/KYMccPX1lAAPfLqByWrx7BXZZQqB1DTABrH4DLp5LtyA7YtQhJqfreEPpdMIjn+0pRLWMEh7PKNf4MeGG9LfMlVvMImFFQRxc+ZKo1HiZIMEybk0rh2LpQgsX5EdA/n51Fqk2PcwFGlK0uu8+wHPb4HlUQ65+1PDAxVQi3bgm3baIldVEoVbLaLqPdt2HYLInZYPye6sySqxzbsfh3F5sr4FgEF1pz7QY8DSkXvtIjTXvQ+ZGYvi+3qeUEiWW5gO9dGsd7C+beSKFdFZCP4/x1ck1duV7x4tRAuySpa9SLa3b7fLaEbzLsf9DSgVLmH1dYrYP8ApqlCDVF/rUp36exUKM0icunklT+L5mF85W1f82pEscgcbcnIll/CY6ofXGmiueJvP+hNQKkSBKGE3moVyeQqXmEflQOgHKL+u9y4ubNLprtQxuUHU66hWQROa7IbwqasoMvAIronE3LtFPUtXlj4aaofPNzAxqG//aA3AVVuwLaP3WFe9fgYx9WIfdDKDWyhAkEQkNrPod46xvF2F7XU+c3BHWyBF+1Et+c8mnL+qgAtpw+hwJpzPyjYth3a2eCCICDEzad5MGWUJp6D2ji0eSFBdBuqBAkNX88XBhQREQUSlzoiIqJAYkAREVEgMaCIiCiQBIBL5hERUfA8CvMkA06SICKKLpb4iIgokBhQREQUSAwoIiIKJAYUEREFEgOKiIgCaT4BZcooCRK4Qw8REd3W/EZQxSxSc/tl9HBNbGRYkhGiLckeKB4vuh5LfBQpqpTC/qs+bNtG/9U+UtxZN9B4vOgmHgTUxRWQ+9kyZZQmr4aSaeRyaXCrlwBSJUSmTzBl1JobF1tSV7ex0VRYWg6qKB+vKJ1XPvIgoM633u7Xi2gq4yOSXMV2Dui7/00ZDW7CQ7PW76I9VUpOIVtsQmFHEUw8XvQFnpX4kunc9DfENBhJNE9m7xTgSD00eLzoS7y9B3XaOy/rqQdAivEUVKokXGy1vdJEc2XiPesSRPfC88p7M5gkYULFKsq8LAqscsOGbY9fhxvYOJx4H+JSbDKdu7hIioSJGW5XvULe6UXteEX1vPKTdwGVyqIIoK/2kWI6kR9SWRTb3Yt7n+YB9tsbEEPbN5zf33U7uc9fYe/0Ine8yGvejqDa++ilyqwpkz+SVWxvNFGTz6/JzYN9oL7Fe6FBxeNFXyDYXm2oZMqQ+1VU5/jp4n5QdJkJuZTCZhvAxmH4RxmRx+NF1/vKgFIhlXrYaqVx0E+hOufSHgOKiCi6vq7EZ/Zw2t7HzsH8w4mIiKLNuxKfDziCIiKKLq7FR0REgcSAIiKiQGJAERFRIDGgiIgokAQAnGVARESB8yjMs+A4i4+IKLpY4iMiokBiQBERUSAxoIiIKJAYUEREFEieBpS7o2RJvtiETJWm3xPNmCmXLjb142ePKLQ8Dahyw4bdr6PY3seB0yuUt1DPeflbiG6iYqe7fbGp33GV+5MRhZT3Jb5kGtN51Aeyq+wkaD7UHrJb3FOIKApmdA+qje54H2dT7iFdZTzRPJiQa5vYTLG0RxQFMwioFLLF8ZemjIN0lVs405wkUT0+L+0d5jaREkqQmVJE96NKkNSrvn1+j7ckyTBhQi6N7/cKJUgen3Azm8V32pMhH6zOdQt4Ike5YaNfBzZ3rjjDiOh+VAm1bAu2baMldlEpVbDZLqLet2HbLYjYuTLU7msGAZVEOgegm0aVpT3yUXL1FYqnPZb6iDxi9rLYHvfryXID27k2ivUWzr+VRLkqItvz7oybzQgqW0erwaETBUAuzQk6RLfkPiokCBBWmmiuTLy/NDRSoTSLyKVnd4Z5E1CmjFJJhmmqkGUVqSqn9pL/1J19vOKMPnqALMvCYDC4898rN+yLRzQON7BxOPG+UUYy3YUyvs9kyjU0i8BpTYY6HjSZsoKuh4HlTUD1u2i3N1E5AFarZYYT+cOUURIurvgU8RisMtNDZFkWnjx5gufPn+Pnn39Gp9Px5geXG9hCBYIgILWfQ711jOPtLmqp80kSO9iCl8UzwQ7xfhXcbiPcfvnlFzQaDWQyGeTzeXz77bcoFAqIx+PIZDJzaUOn04GmaSgUCigUCojFYnP5vUSz9vTpUxiG4b5fWFjA8vIy1tbWsLy8jIWFhZt/gCpBQsPTwLkrBhT5Rtd1PH/+/Mo/y+fz+PDhw5dPIg/a0Gg0oOs6Op0OMpkMCoUCnj17hnw+j6WlpZn+fqJZGAwGePPmzZUjJ1EU8f79+5mfW15gQJGvnjx5cqlWPq9wukqn04Gu6/j06ZMbWvl8Hvl8Hs+ePXNHWkRBYFmW+5n977//3M9sLBbDwsLC1LkVi8Xw66+/YnNz078G3xEDiuZO0zTs7e3h6OgIw+EQlmW5f+ZnOF1H07Sp0NJ1HYVCwQ2tfD7P0KKZ03Udg8EAuq7j5OQEhmFgMBigUCggk8lgcXHR/VwuLCxgd3cXb968AQAkEgn8+eefofucMqBoLpxQUhQFsVgMoiiiUqnAsiz88MMPAIDl5WX89ddfobgP5ITWyckJdF2HYRju6MoJrXw+73czKYSGwyEMw0Cn08HZ2Zn7dSKRQCaTwffff498Po9MJnPjvVrDMPD06dNQlfQ+x4CimVEUBX///TcURUE8Hsf6+jpev3596aT67rvvkM/nQxNOV3FKLZ1OB58+fUKn08FgMMDS0hLy+fxUp0Lk0DQNg8EAZ2dnbqnOsix3JLS4uOjeF73PuVGv10NV0vscA4o8Y1kWjo6O3FBKJBJYX1+HKIo3dsy7u7sQRTG04XSd0WgEXdehaZpbHhwOh5dGWgyt6HPKcc4FjGEYMAzDPf6Li4tYWlpCIpFAIpHwu7mBwYCir2JZ1tRIKZPJoFKpQBRFnmhXGI1G7kjLKQ9aloV8Po8XL164pUH+24WTc1Gi67pbntM0zX104sWLF8hkMkgkEqG7H+QHBhTd2Wg0gqIo+Oeff6AoCgqFgjtSisfjfjcvdIbDoTv76uTkxJ0a7ISWU+7hv22wOPceDcPAx48fYRgGhsMhlpaW3FGRc8ERxvs/QcCAoltxQskZKYmiiJcvXzKUZsSZraXrOj5+/Ahd1xGLxdz7WQyt+XEmLWia5o6KdF13JylMlmpZrvUWA4quNRwO3VA6OjqCKIpYW1uDKIq8IvTB5D0Mp0wYj8fd6e7OhAwem/vTNA2GYeDs7GzqmSLnUYLHjx8jk8nwAe45YUDRFCeU9vb20Ol0pkIpapMYosC5mndCS9M0JBKJqZEWl3C6zCnNXfdM0ePHj91SHUep/mFAEQaDARRFQavVwmAwcNfrYiiFk1MadGYOaprmrnc4uRpGYI6tKaOU2servveL+zqTFm56psgpzfG5teBhQD1QhmG4I6XBYDA1UqLocTrp65Zwusu6g+VyGe/evfNmFpoqQVhpAiii/pUB1el03PKc8/VoNJpaacEp1QUmnOlGDKgHxDAM7O7uYm9vD6PRyA2l5eVlv5tGPphcd9D52gkt58Hiz0PIsix88803iMVi+O233/Djjz960BIVklBD9g4BpWma+3yZM6HEmZ7vjBKd6dwUXgyoiNN1Ha1WC0dHR7AsC8vLy1hfX+dNXrrSl9YdBICffvrJ/e9fv36N9+/ff+WI5G4BNRqN8PbtW3dU5Ky0QNHDgIogJ5QURQEAd9071tjpPjRNu7SE0yRnmar7j1buPoKih4EBFRGTi7EuLCy4D84ylMhLb9++xR9//HHp+wsLC1BV9Z4jGQYUXe2R3w2g+5tc9y4ej2NtbQ0fPnzgw4I0M5Mb4MXjcSwtLeHly5fuOnJEXmJAhczkag6JRAKVSgX//vsvOweaOcuykEgkIEmS+1Aw0SwxoALOWYzVWfcun89jbW0N7969YyjRXMViMaiq6ncz6AHhPagA+nyFcC7GSpFlyiilNtEev904tNEo+9oiChAGVEBMLsZ6dHQ0tZoD11YjooeIAeWjz0NpcoVwhhIRPXQMqDnjYqxERLfDgJqT33//HXt7e9B1neveERHdAmfxzcFwOMRwOES1WmUoERHdEkdQREQUSP/zuwFERERXYUAREVEgMaCIiCiQGFBERBRIDCgiIgokBhQREQUSA4qIiAKJAUVERIHEgCIiokBiQN2BKpUgCAJKkgwTJuSSAEEQIAglSLLpd/OIiCKFAXVbqoRatgXbttESu6iUKthsF1Hv27DtFkTsQOJmo0REnmFA3ZLZy2K7mgQAJMsNbOfaKNZbOP9WEuWqiGyPoygiIq8woMZUySnXXfG6NDRSoTSLyKWTvrSViOghYECNlRs2bPuaV6OMZLoLZXyfyZRraBaB05oMdTxoMmUFXQYWEZFnGFC3VW5gCxUIgoDUfg711jGOt7uopc4nSexgC42y340kIooO7gdFRESBxBEUEREFEgOKiIgCiQFFRESBxIAiIqJACnVAcYIEEVF0hTqgiIgouhhQREQUSP8Hi2uGFwcWjBYAAAAASUVORK5CYII=)
A. 3
B. 5
C. 2
D. 4
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2019 môn Toán Trường THPT Chuyên Thái Nguyên lần 1A. 3
B. 5
C. 2
D. 4
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG năm 2019 môn Toán Trường THPT Chuyên Thái Nguyên lần 1