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Answer

Solution

UPSC Prelims

Mathematics

Theme:

Statistics / सांख्यिकी

Q23 2018, Statistics

If X is between -3 and 1, and Y is between -1 and 1, then X² - Y² is in between which of the following?

यदि X, -3 और 1 के बीच में है तथा Y, -1 और 1 के बीच में है, तो X² - Y² निम्नलिखित में से किनके बीच में होगा?

Explanation

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Then If X is between -3, -1

X² is between 1 to 9

If Y is between -1, 1

Then Y² is between 0, 1

⇒ X² – Y² is between 0, 9.

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Q 23. 2018, Statistics

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