JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

1 Easy

1 of 1

Analyzing +4 | -1

Let

S_n

denote the sum of the first

n

terms of an A.P.

a_1, a_2, a_3, \ldots, a_n

. If

a_5+a_9=1

and

S_9=6

, then which of the following is not true?

View answer and explanation

Correct option: B

S_6=\frac{19}{2}

Option B (

S_6=\frac{19}{2}

) is not true because, with the calculated values of

a_1

and

d

S_6

is actually equal to

\frac{19}{4}

More Questions from SEQUENCE OF SERIES

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

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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

\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}