JEE MATHEMATICS MCQ: SEQUENCE OF SERIES

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Application +4 | -1

If the ratio of the sum of n term of two AP’s be

\left( {7n + 1} \right):\left( {4n + 27} \right),

then the ratio of their 11th term will be

View answer and explanation

Correct option: C

4\mathrm{ }:\mathrm{ }3

Option C (4 : 3) is correct because substituting n = 21 into the ratio of the sums and simplifying gives the ratio of their 11th terms as 4/3.

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,x,b

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

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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}