अनुक्रम \(12,17,22,27,\ldots\) में कितने पद (60) से छोटे हैं?
How many terms of the sequence \(12,17,22,27,\ldots\) are less than (60)?
Explanation opens after your attempt
C. (10)
Concept
Here (a_n=12+5(n-1)), and (12+5(n-1)<60) gives (n<10.6). So (10) terms are less than (60).
Why this answer is correct
The correct answer is C. (10). Here (a_n=12+5(n-1)), and (12+5(n-1)<60) gives (n<10.6). So (10) terms are less than (60).
Exam Tip
यहाँ (a_n=12+5(n-1)) और (12+5(n-1)<60) से (n<10.6) मिलता है। इसलिए (10) पद छोटे हैं।
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