Arithmetic Progressions
CBSE 2026 Board Exam Set 1 (Code 30/7/1)
CBSE_BOARD_PYQ_2026_30_7_1
Grade 10
Question:
[Section A]
Which of the following is an A.P.?
(A) $1, 3, 9, 27, \dots$
(B) $3, 3+\sqrt{2}, 3+2\sqrt{2}, 3+3\sqrt{2}, \dots$
(C) $a, a^2, a^3, a^4, \dots$
(D) $1, 2, 4, 8, \dots$
Step-by-Step Solution
Key Concept: Common difference is constant $d = \sqrt{2}$.
Sol. (B) $3, 3+\sqrt{2}, 3+2\sqrt{2}, 3+3\sqrt{2}, \dots$. [1.0 Mark]
Correct Answer: (B) $3, 3+\sqrt{2}, 3+2\sqrt{2}, 3+3\sqrt{2}, \dots$
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