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Question 155Asked in DSSSB TGT Computer Science, 24 Jun 2023, Shift 3 (4:30 PM)

The values of x are I, 3, 4 and those off(x) are I, 27, 64. What is the polynomial equation by using the Lagrange interpolation formula?

  1. A8x² − 19x + 12
  2. B8x² + 9x + 12
  3. C8x² − 9x + 12
  4. D8x² + 9x + 12
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Correct answer: (A) 8x² − 19x + 12

Explanation

Check 8x² − 19x + 12: at x = 1 it gives 1, at x = 3 it gives 72 − 57 + 12 = 27, and at x = 4 it gives 128 − 76 + 12 = 64. It matches all three points.

From DSSSB TGT Computer Science PYQ, 24 Jun 2023, Shift 3 (4:30 PM)

This is question 155 of DSSSB TGT Computer Science PYQ, 24 Jun 2023, Shift 3 (4:30 PM). 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.