Answer:
C
Step-by-step explanation:
The terms form a geometric sequence with common ratio r
r = 
= 
= ......
r = 
= 
= - 
The n th term formula of a geometric sequence is
= a 
← a is the first term
here a = - 81, hence
f(x) = - 81
→ C
Remember the chain rule.
L(x)=f(g(x))
L'(x)=f'(g(x))g'(x)
take the derivative of f(g(x)). just treat them like they are variables. so you get:
h'=f'(g(x))g'(x)
now plug in your x value and evaluate:
h'(1)=f'(g(1))(g'(1))
substitute in values that you know and evaluate again
h'(1)=f'(3)(-3)
h'(1)=(-5)(-3)=15
Answer:
B
Step-by-step explanation:
(4+x)+x=22
= 4+2x=22
= 2x = 18
= x = 9.
Gabriel is 9 years old, and Dan is 4 + 9 or 13 years old.
