JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Analyzing +4 | -1

Let

a_{1}, a_{2}, a_{3}, \ldots

. be a G.P. of increasing positive numbers. Let the sum of its

6^{\text {th }}

and

8^{\text {th }}

terms be 2 and the product of its

3^{\text {rd }}

and

5^{\text {th }}

terms be

\frac{1}{9}

. Then

6\left(a_{2}+a_{4}\right)\left(a_{4}+a_{6}\right)

is equal to

View answer and explanation

Correct option: A

Option A, 3, is correct because solving the geometric progression equations and substituting the values gives 3.

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}