周期性 1200+400cos((pit)/3)

解答

周期性

1200 + 400 cos (\frac{π t}{3})

6

求解步骤

周期

cos (b x + c) + d = \frac{cos ( x ) 的周期}{∣ b ∣}

cos (x)

的周期是

2 π

= \frac{2 π}{\frac{π}{3}}

化简

= 6

r an g e f (x) = x^{2} - 10 x + 21

d o main 9 x^{6} - x^{5} - 2 x^{3} + 2

a sy m pt o t es f (x) = \frac{x ^{3}}{x ^{2}}

d i s t an ce (- 2, 4), (13, 10)

d o main h (x) = ln (x + 6)