JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Application +4 | -1

The natural numbers are written as follows

\begin{array}{cccccccccccccccccccc} &&&1 \\ &&2&&3& \\ &4&&5&&6 \\ 7&&8&&9&&{10} \\ \begin{gathered} . \\ . \\ . \\ \end{gathered} &&\begin{gathered} . \\ . \\ . \\ \end{gathered} &{}&\begin{gathered} . \\ . \\ . \\ \end{gathered} &{}&\begin{gathered} . \\ . \\ . \\ \end{gathered} \end{array}

The sum of the numbers in the

n^{\text {th}}

row is

View answer and explanation

Correct option: B

\frac{n}{2}\left(n^2+1\right)

Option B is correct because the sum of the numbers in the nth row is found by recognizing the arithmetic progression and applying the sum formula.

More Questions from SEQUENCE OF SERIES

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A=\{1,2,3\}, B=\{3,4\}, C=\{4,5,6\}

{A} \cup({B} \cap {C})

A-(B \cap C)

(B \cup C)-A

a,b,c

a,x,b

b,y,c

{x^2},{b^2},{y^2}

P(x)=1-x+x^2-x^3+\ldots+x^{2012}

y

Q(y)=a_0+a_1 y+\ldots+a_{2012} y^{2012}

y=x-2

\sum\limits_{{i=0}}^{2012} a_i

\log \left(\frac{5 c}{a}\right), \log \left(\frac{3 b}{5 c}\right)

\log \left(\frac{a}{3 b}\right)

A P

a, b

G P

a, b, c

\frac{3}{4}