यदि समानांतर श्रेढ़ी का (5)वाँ पद (27) और समान अंतर (3) है, तो पहला पद क्या है?
If the (5)th term of an arithmetic progression is (27) and the common difference is (3), what is the first term?
Explanation opens after your attempt
B. (15)
Concept
\(a_5=a+4d\), so (27=a+12) and (a=15). To move backward from a given term subtract common differences.
Why this answer is correct
The correct answer is B. (15). \(a_5=a+4d\), so (27=a+12) and (a=15). To move backward from a given term subtract common differences.
Exam Tip
\(a_5=a+4d\) इसलिए (27=a+12) और (a=15)। दिए पद से पीछे जाने के लिए समान अंतर घटाएं।
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