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2 questions · timed · auto-graded

Question 14 Marks
Column - IColumn - II
(a) $1^2+2^2+3^2+\ldots+n^2$(i) $\left(\frac{n(n+1)}{2}\right)^2$
(b) $1^3+2^3+3^3+\ldots+n^3$(ii) n(n+1)
(c) $2+4+6+\ldots+2 n$(iii) $\frac{n(n+1)(2 n+1)}{6}$
(d) $1+2+3+\ldots+n$(iv) $\frac{n(n+1)}{2}$
Answer
(a) ↔ (iii), (b) ↔ (i), (c) ↔ (ii), (d) ↔ (iv)
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Question 24 Marks
Column - IColumn - II
(a) 2, 3, 5, 7, . . .(i) series
(b) 13, 8, 3, -2, -7, . . .(ii) sequence
(c) 1 + 2 + 3 + 4 + . . .(iii) A.P.
(d) 1, 3, 5, 7, . . .(iv) Sequence with $a_n=2 n-1$
Answer
(a) ↔ (ii), (b) ↔ (iii), (c)↔ (i), (d) ↔ (iv) 
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