समान्तर श्रेणी \(42,55,68,\ldots\) में कितने पद (1000) से कम हैं?
In the AP \(42,55,68,\ldots\), how many terms are less than (1000)?
Explanation opens after your attempt
C. (74)
Concept
From (42+13(n-1)<1000), (13(n-1)<958). The greatest (n=74).
Why this answer is correct
The correct answer is C. (74). From (42+13(n-1)<1000), (13(n-1)<958). The greatest (n=74).
Exam Tip
(42+13(n-1)<1000) से (13(n-1)<958)। सबसे बड़ा (n=74) है।
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