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Question 88Asked in DSSSB TGT Computer Science (Technical), 1 Aug 2021, Shift 3

If f(1) = 4 and f(5) = 6, then what is the value of f(3) using Lagrange's interpolation?

  1. A5
  2. B6.5
  3. C4
  4. D3
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Correct answer: (A) 5

Explanation

Lagrange's formula with two points: f(3) = 4·(3−5)/(1−5) + 6·(3−1)/(5−1) = 4×0.5 + 6×0.5 = 5.

From DSSSB TGT Computer Science PYQ (Technical), 1 Aug 2021, Shift 3

This is question 88 of DSSSB TGT Computer Science PYQ (Technical), 1 Aug 2021, Shift 3. 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.