Question 120Asked in BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam)

For what values of α and β, the quadrature formula ∫₋₁¹ f(x) dx ≈ α f(−1) + f(β)α और β के किन मानों के लिए, चतुर्भुज सूत्र

For what values of α and β, the quadrature formula ∫₋₁¹ f(x) dx ≈ α f(−1) + f(β) is exact for all polynomials of degree ≤ 1?
α और β के किन मानों के लिए, चतुर्भुज सूत्र ∫₋₁¹ f(x) dx ≈ α f(−1) + f(β) घात ≤ 1 के सभी बहुपदों के लिए सटीक है?
  1. Aα = 1, β = 1α = 1, β = 1
  2. Bα = −1, β = 1α = −1, β = 1
  3. Cα = 1, β = −1α = 1, β = −1
  4. DMore than one of the aboveउपर्युक्त में से एक से अधिक
  5. ENone of the aboveउपर्युक्त में से कोई नहीं
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Correct answer: (A) α = 1, β = 1α = 1, β = 1

Explanation

Exactness for f = 1 gives 2 = α + 1, so α = 1. For f = x it gives 0 = −α + β, so β = α = 1.f = 1 के लिए सटीकता से 2 = α + 1, अतः α = 1। f = x के लिए 0 = −α + β, अतः β = α = 1।

From BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam) — Previous Year Paper

This is question 120 of BPSC TRE 2.0 (2023) Mathematics Class 9-10 (Re-exam) — Previous Year Paper. See all questions of this paper with answers, or attempt the paper as a timed online test to get your score and all-India rank.