JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Application +4 | -1

If the sum to first

n

terms of the AP 2, 4, 6,… is 240, then the value of

n

View answer and explanation

Correct option: B

Option B (15) is correct because the sum of the first n terms of an AP is used to form a quadratic equation, which is then solved for n.

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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

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y=x-2

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

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

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\frac{3}{4}