यदि (a_n=\frac{n(n+3)}{2}) है, तो चौथा पद क्या होगा?
If (a_n=\frac{n(n+3)}{2}), what is the fourth term?
Explanation opens after your attempt
C. (14)
Concept
(a_4=\frac{4(4+3)}{2}=14). In exams, simplify the bracket first.
Why this answer is correct
The correct answer is C. (14). (a_4=\frac{4(4+3)}{2}=14). In exams, simplify the bracket first.
Exam Tip
(a_4=\frac{4(4+3)}{2}=14) है। परीक्षा में कोष्ठक पहले सरल करें।
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