Answer:
3. f
4. b
5. a, x
Explanation:
3.
a/f = f/c
f² = ac
f = √ac
Answer: f
4.
x/b = b/c
b² = cx
b = √cx
Answer: b
5.
x/k = k/a
k² = ax
k = √ax
Answer: a, x
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