Answer: a. 55
Step-by-step explanation:
The formula to find the geometeric mean between two numbers a and b is given by :-
The given numbers are : 275 and 11
The geometric mean of 275 and 11 is given by :-
Hence, the geometric mean of 275 and 11 is 55.
So , the correct option is a. 55 .
Answer:
Step-by-step explanation:
Given
Solving (a): Write as inverse function
Represent a(d) as y
Swap positions of d and y
Make y the subject
Replace y with a'(d)
Prove that a(d) and a'(d) are inverse functions
and
To do this, we prove that:
Solving for
Substitute for d in
Solving for:
Substitute 5d - 3 for d in
Add fractions
Hence: