Answer:
f(x) = sec x. tan x
⇔ f(x) = 1/cosx . cosx/sinx
⇔ f(x) = sin x
+) when f(x) is increasing => sin x increases
=> x will increase
+) f(x) is decreasing => x will decrease
+) f(x) is concave up => x ∈ (-pi/2; 0)
+) f(x) concave down => x ∈ (0; pi/2)
Step-by-step explanation:
Answer:
v=0.79x+3.99
f=1.89x+5.49
combined cost: 2.68×+9.48
Answer:
x=25 degrees and the angles are vertical (opposite each other)
Step-by-step explanation:
(4x-25)=75
4x=100
x=25
Answer:
Answer 5
Step-by-step explanation:
-6+12-2+1
=6-2+1
=5
Answer:
(3,13)
Step-by-step explanation:
Because the smallest x value is 3 and 3 is the closest to 0.
