The sums of n terms of two arithmetic pr...

The sums of n terms of two arithmetic progressions are in the ratio 5n + 4 : 9n + 6. Find the ratio of their `18^(th)` terms.

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The correct Answer is:

`179/321`

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NCERT TAMIL-SEQUENCES AND SERIES-EXERCISE 9.2

Find the sum of odd integers from 1 to 2001.
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Find the sum of all natural numbers lying between 100 and 1000, which ...
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In an A.P., the first term is 2 and the sum of the first five terms is...
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How many terms of the A.P. -6, -11/2, -5,… are needed to give the sum ...
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In an A.P. if p^(th) term is 1/q and q^(th) term is 1/p , prove that t...
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If the sum of a certain number of terms of the A.P. 25, 22, 19, … is 1...
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Find the sum to n terms of the A.P., whose k^("th") term is 5k + 1.
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If the sum of n terms of an A.P. is (pn + qn^2) , where p and q are co...
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The sums of n terms of two arithmetic progressions are in the ratio 5n...
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If the sum of first p terms of an A.P. is equal to the sum of the firs...
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Sum of the first p, q and r terms of an A.P. are a, b and c, respectiv...
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The ratio of the sum of m and n terms of an A.P. is m^(2):n^(2). Show ...
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If the sum of n terms of an A.P. is 3n^(2) + 5n and its m^(th) term is...
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Insert five numbers between 8 and 26 such that the resulting sequence ...
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If (a^(n)+b^n)/ (a^(n-1) +b^(n-1)) is the A.M. between a and b, then f...
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Between 1 and 31, m numbers have been inserted in such a way that the ...
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A man starts repaying a loan as first installment of Rs. 100. If he in...
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The difference between any two consecutive interior angles of a polygo...
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