A man is trying to zombie-proof his house. He wants to cut a length of wood that will brace a door against a wall. The wall is 4
feet away from the door, and he wants the brace to rest 2 feet up the door. About how long should he cut the brace?
1 answer:
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Answer:
The no. of variations in sign is 3
Step-by-step explanation:
Variation in sign occurs when every single time a negative product is produced by a pair of consecutive terms.
Therefore, the determination of the number of changes in sign in the given sequence is must.
Therefore, we take the product of the pair of consecutive terms as:
= - 3, variation in sign
= - 6, variation in sign
= 10, no sign variation
= - 20, variation in sign
= 24, no sign variation
