Please enter the following details
Free Daily Targets & Mocks
Study Material & Formulas PDFs
1 on 1 Mentorship
Question 20
The nth element of a series is represented as
$$X_n = (-1)^nX_{n-1}$$
If $$X_0 = x$$ and $$x > 0$$, then which of the following is always true?
Solution
Let x = 1, so, $$X_0$$ = 1
$$X_1$$ = -1
$$X_2$$ = -1
$$X_3$$ = 1
$$X_4$$ = 1
$$X_5$$ = -1
$$X_6$$ = -1
So, $$X_n$$ need not be positive when n is even, $$X_n$$ need not be positive when n is odd, $$X_n$$ need not be negative when n is even. So, none of the first three options are correct.
Your Doubts
Ask a Doubt
(know more)
Drop Your File Here!
Ask Your Doubt
Drop Your File Here!
Create a FREE account and get:
- All Quant CAT complete Formulas and shortcuts PDF
- 38+ CAT previous year papers with video solutions PDF
- 5000+ Topic-wise Previous year CAT Solved Questions for Free
CAT Quant Questions | CAT Quantitative Ability
CAT Venn Diagrams QuestionsCAT Progressions and Series QuestionsCAT Time, Speed and Distance QuestionsCAT Simple Interest Compound Interest QuestionsCAT Probability, Combinatorics Questions
CAT DILR Questions | LRDI Questions For CAT
CAT Selection With Condition QuestionsCAT Puzzles QuestionsCAT Maxima-Minima QuestionsCAT Routes And Networks QuestionsCAT Coins and Weights Questions
