Answer:
Đáp án B
Step-by-step explanat
B1:X ét VT=15x +35(1)
B2Xét VP thấy 15x +35 (2)
B3 KL
Answer:
times 0.4
Step-by-step explanation:
The recursive formula allows a term in the sequence by multiplying the previous term by the common ratio r
Here
r = 
= 
= 0.4
Thus the recursive formula is
c(n) = c(n - 1) × 0.4 → with c(1) = 500 ← the first term in the sequence
Answer:
a) t = 0,22 sec
b) 0.85 lts/sec
c) Interval for inhalation [ 0 < ( π/4.5 t) ≤ π ]
Interval for exhalation [ π < ( π/4.5 t ) ≤ 2π ]
Step-by-step explanation:
The respiratory cycle is approximated
r(t) = 0.85 sin (π/4,5t)
a) how long is the respiratory cicle.
As for problem statement a respiratory cicle is time between two consecutive breath
Then cycle will go from sin (π/4.5 t) = 0 to the position when sin (π/4.5 t) becomes negative that is when sin (π/4.5 t) < 0 or just after (π/4.5 t) is equal to π , so
sin (π/4.5 t) = sin (π) or (π/4.5 t) = π
solving for t t = π /π*4,5
t = 1/ 4,5
t = 0,22 sec
b) The maximum rate of air intake is when sin( π/4.5 t) takes its maximum value which is 1.
maxmum rate of air intake is: 0.85 lts/sec
c) Interval for inhalation [ 0 < ( π/4.5 t) ≤ π ]
Interval for exhalaton [ π < ( π/4.5 t ) ≤ 2π ]
If I'm not mistaken I think that it is 8 minutes and 33 seconds
Answer:
32
Step-by-step explanation:
Absolute value means takes the positive value
|-32| = 32
