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What is the 21st term of the AP −28, −20, −12, …?समान्तर श्रेणी −28, −20, −12, … का 21वाँ पद क्या है?
Answer and explanationउत्तर और व्याख्या
Correct answer:सही उत्तर: 132132
The first term is −28 and the common difference is −20 − (−28) = 8. Thus, a₂₁ = −28 + (21 − 1) × 8 = −28 + 160 = 132.पहला पद −28 और सार्व अंतर −20 − (−28) = 8 है। इसलिए a₂₁ = −28 + (21 − 1) × 8 = −28 + 160 = 132।
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