समांतर श्रेढ़ी \(-3,-7,-11,-15,\ldots\) का (12)वाँ पद क्या होगा?
What will be the (12)th term of the AP \(-3,-7,-11,-15,\ldots\)?
Explanation opens after your attempt
Correct Answer
A. (-47)
Concept
Here (a=-3), (d=-4), so (a_{12}=-3+11(-4)=-47). Check signs twice when both values are negative.
Why this answer is correct
The correct answer is A. (-47). Here (a=-3), (d=-4), so (a_{12}=-3+11(-4)=-47). Check signs twice when both values are negative.
Exam Tip
यहाँ (a=-3), (d=-4) है, इसलिए (a_{12}=-3+11(-4)=-47)। दोनों मान ऋणात्मक हों तो चिन्ह दो बार जाँचें।
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