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

If (Q(t)=100-4t), (Q(1)+Q(9)) is equal to twice which (Q(k))?

Answer and explanation

Correct answer: Q(5)

This is a linear function. The midpoint of 1 and 9 is \(\frac{1+9}{2}=5\), so \(Q(1)+Q(9)=2Q(5)\). Checking directly, \(Q(1)=96\) and \(Q(9)=64\), giving a sum of \(160\). Also, \(Q(5)=80\), hence \(2Q(5)=160\). \(Q(4)\) is not at the midpoint, so it is not correct. Exam tip: for a linear function, the sum of the values at two inputs equals twice the value at their midpoint.

Related tags

Linear FunctionLinear DecayMidpoint PropertyPolynomialsAlgebraLinear Growth And DecayIntroduction To PolynomialsMathematics

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.