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teed0ll9
02.10.2020 •
Mathematics
Which of the following fits with the recursive rule for the dots above?
Group of answer choices
A) f (x) = f ( x - 1 ) x 4 ; f (1) = 4
B) f (t) = 4t + 1
C) f (x) = f ( x - 1 ) + 4 ; f (1) = 4
D) f (x) = 1 x 4(2)
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Ответ:
A
Step-by-step explanation:
The recursive rule lets us find a term in the sequence from the previous term.
The sequence of dots is
4 , 16, 64
Thus multiplying the previous term by 4 gives the required term, thus
f(x) = f(x - 1) × 4 : f(1) = 4
so
f(2) = f(1) × 4 = 4 × 4 = 16 ← true
f(3) = f(2) × 4 = 16 × 4 = 64 ← true
A is the correct choice
Ответ:
120
Step-by-step explanation:
if the 2 is 20, then the 3 must be 30 and 7, 70.