(5) से शुरू होने वाली और (9) के अंतर वाली समांतर श्रेणी के पहले (17) पदों का योग कितना होगा?
What will be the sum of the first (17) terms of an arithmetic progression starting with (5) and having common difference (9)?
Explanation opens after your attempt
B. (1309)
Concept
The seventeenth term is (149), so (S_{17}=\frac{17}{2}(5+149)=1309). Find the last term first and use the average method.
Why this answer is correct
The correct answer is B. (1309). The seventeenth term is (149), so (S_{17}=\frac{17}{2}(5+149)=1309). Find the last term first and use the average method.
Exam Tip
सत्रहवाँ पद (149) है, इसलिए (S_{17}=\frac{17}{2}(5+149)=1309)। पहले अंतिम पद निकालकर औसत विधि लगाएँ।
Login to save your score, XP, coins and progress.
