Update

Muft Shiksha™ एक 100% Free Education Portal है 🇮🇳, जिसका उद्देश्य Class 9–12 के हर विद्यार्थी तक High-Quality Education को पूरी तरह मुफ्त पहुँचाना है। 🇮🇳 हम मानते हैं कि अच्छी शिक्षा किसी student की आर्थिक स्थिति पर निर्भर नहीं होनी चाहिए। 🇮🇳 हर विद्यार्थी को वही Quality Study Material, MCQs, Quizzes, Exam Preparation, Concept-Based Learning और Bilingual Support मिलना चाहिए, जो आमतौर पर महंगी Coaching या Premium Platforms में मिलता है। Muft Shiksha™ 🇮🇳 इसी सोच के साथ बनाया गया है

Subjects
0 reads0 ratings0 helpful

Find the (11)th term of the AP (48,42,36,30,\ldots).

Answer and explanation

Correct answer: \(-12\)

For this AP, the first term is \(a=48\) and the common difference is \(d=42-48=-6\). The \(n\)th term is \(a_n=a+(n-1)d\). Hence, \(a_{11}=48+(11-1)(-6)=48-60=-12\). Therefore, \(-12\) is correct. A value such as \(-14\) may result from miscounting terms or using \(n\) instead of \((n-1)\). Exam tip: always use \((n-1)\) in the formula for the \(n\)th term.

Related tags

Arithmetic ProgressionNth TermCommon DifferenceClass 10 MathematicsAp FormulaFinding The $N$Th Term Of An ApFinding The N Th Term Of An ApArithmetic Progressions (Ap)

Was this question useful?

No ratings yetWrite a review / Rate this question

Student Reviews

No published reviews yet.

Add Muft Shiksha to your Home Screen

In Safari, tap Share, then Add to Home Screen.