गुणोत्तर श्रेढ़ी \(1,-2,4,-8,\ldots\) का पाँचवाँ पद क्या है?
What is the fifth term of the geometric progression \(1,-2,4,-8,\ldots\)?
Explanation opens after your attempt
B. (16)
Concept
The common ratio is (-2), so the fifth term is ((-8)(-2)=16). With a negative ratio signs alternate.
Why this answer is correct
The correct answer is B. (16). The common ratio is (-2), so the fifth term is ((-8)(-2)=16). With a negative ratio signs alternate.
Exam Tip
सार्व अनुपात (-2) है, इसलिए पाँचवाँ पद ((-8)(-2)=16) है। ऋणात्मक अनुपात में चिह्न बदलता है।
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