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If the sum of the first (n) natural numbers is (406), what is the value of (n)?यदि पहली (n) प्राकृतिक संख्याओं का योग (406) है तो (n) का मान क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: (28)(28)
(S_{28}=\frac{28\times29}{2}=406), so (n=28). You can quickly check by substituting the options in the formula.(S_{28}=\frac{28\times29}{2}=406) इसलिए (n=28) है। विकल्पों को सूत्र में रखकर जल्दी जांच सकते हैं।
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