f=10(65-65)+50

解答

f = 10 (65 - 65) + 50

f = 50

求解步骤

f = 10 (65 - 65) + 50

化简

10 (65 - 65) + 50 : 50

f = 50

\frac{4 x + 8}{2} < 8

4 x^{2} + 24 x + 16 = 5

16 t^{2} - 204 t + 100 = 0

3 \leq \frac{2 x - 9}{5} < 7

∣ 1 - x ∣ \geq - 1