To evaluate the combination we proceed as follows:
21C3
Given nCk we shall have:
n!/[(n-k)!k!]
thus plugging the values in the expression we get:
21!/[(21-3)!3!]
=21!/(18!×3!)
=1330
Answer: 1330
Answer:
Option C. f(x) and g(x) are the same when x = 2.
Step-by-step explanation:
step 1
Find the value of f(x) for x=2
we have
For x=2
Substitute in the function
step 2
Find the value of g(x) for x=2
Observing the graph
For x=2 ----> the value of g(2)=3
step 3
Compare the values
f(2)=3
g(2)=3
therefore
f(x) and g(x) are the same when x = 2.
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