Step-by-step explanation:
Lets derive this equation,
we can write ,
going by the identity,
using the identity ,
.................(1)
After simplification of equation no.1 we get -
............... (for any value of a)
Hence the equation is proved for every value of a.
Answer:
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Step-by-step explanation:
just got it correct on apx
Answer:
Axis of Symmetry:
x=2
Vertex:
(2,11)
Step-by-step explanation:
Finding the derivative:
f'(x)=-10x+20
Setting the slope equal to zero:
-10x+20=0 x-2=0 x=2
Finding vertex:
f(2)=-5*(2)^2+20*2-9
=-20+40-9=20-9=11
(2,11)
Example: -1<?<3
Number of rooms can be wired by electrician is approximately 3
Solution:
Given that electrician needs rolls of electrical wire to wire each room in a house
To find: number of rooms can he wire with rolls of wire
From given information,
Rolls of wire needed for 1 room =
Total rolls of wire =
So number of rooms can be wired:
Thus number of rooms can be wired is or approximately 3 rooms