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Arithmetic Progressions — Maths STD 10 — Question

CBSE BoardEnglish MediumSTD 10MathsArithmetic Progressions1 Mark
MCQ
Choose the correct answer from the given four options:
The first four terms of an AP, whose first term is -2 and common difference is -2, are:
  • A
    -2, 0, 2, 4
  • B
    -2, 4, – 8, 16
  • ✓
    -2, – 4, – 6, – 8
  • D
    -2, – 4, – 8, –16
✓

Answer

Correct option: C.
-2, – 4, – 6, – 8
Let the first four terms of an AP are a, a + d, a + 2d and a + 3d.
Given, that first term, a = -2 and common difference, d = -2, then have an AP as follows-
= -2, -2 - 2, - 2 + 2(-2), -2 + 3(-2)
= -2, -4, -6, -8

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