Step-by-step explanation:
if14a^2b/7a^2b answer is 2
and if the sign is addition then the answer is21a^2b if subtraction answer is7a^2b
I'll explain how to do the first one:-
y = cos-1(x2)
This can be described as ' a function of a function' x^2 is a function of x and cos-1(x^2) is a function of x^2.
We need to apply the chain rule.
Personally I find this easier to understand if i let u = x^2, so
If y = f(u) and u is a function of x then
dy/dx = dy/ du * du/dx
Here u = x^2 and y = cos-1(u)
du/dx = 2x
so dy/dx = d(cos-1(x^2) dx = dy/du * du/dx
= -1 / √(1 - u^2) * 2x
= -2x / √(1 - u^2)
= -2x / √(1 - (x^2)^2)
= -2x / √(1 - x^4)
I hope this helps. but if not. you might like to employ the formulae in the question - The square boxes contain the 'u' s in my answer. These formulae are equivalent to my explanation.
Answer:
y = 3x + 11
Step-by-step explanation:
Answer:
5
Step-by-step explanation:
Answer:
The cost price of 12 boxes of pudding is $3.96
Step-by-step explanation:
Given as :
The quantity of pudding boxes = 3
The cost price for 3 boxes = $0.99
Again ,
The quantity of pudding boxes = 12
Let The cost price for 12 boxes = $x
Now, According to question
<u>Using Unitary method</u>
∵ The cost price of 3 boxes of pudding = $0.99
or,The cost price of 1 boxes of pudding = 
= $0.33
∴The cost price of 12 boxes of pudding =$0.33 × 12
I.e x =$3.96
So,The cost price of 12 boxes of pudding = x =$3.96
Hence,The cost price of 12 boxes of pudding is $3.96 Answer
