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DISHA PUBLICATION-SEQUENCES AND SERIES -EXERCISE -1 : Concept Builder
- If Sn denote the sum of first n terms of an A.P. whose first term is a...
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- If the angles A lt B lt C of a triangle are in A.P, then
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- If a1, a2, a3, be terms of an A.P. if (a1+a2++ap)/(a1+a2++aq)=(p^2)/(...
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- If(5+9+13+....to n terms)/(7+9+11+....to(n+1) terms)=17/16, then n=
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- If log2,log(2^x-1)a n dlog2log(2^x+3) are in A.P., write the value of ...
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- If a1,a,a3...an are in A.P then prove that a1^2-a2^2+a3^2-a4^2+....a(2...
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- If cos x = b.For what b do the roots of the equation form an A.P.?
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- 25 trees are planted in a straight line 5 metre apart from each other....
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- If a(1), a(2), a(3),........, a(n),... are in A.P. such that a(4) - a(...
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- If a1,a2,a3,...,a(n+1) are in A.P. , then 1/(a1a2)+1/(a2a3)....+1/(ana...
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- At what values of parameter a are there values of x such that the numb...
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- Let Tr be the r^(th) term of an A.P whose first term is a and common d...
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- Find the number of common terms to the two sequences 17,21,25,...,417 ...
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- The sum of the series 2/3+8/9+(26)/(27)+(80)/(81)+ to n terms is n-1/2...
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- If 1/(sqrt(b)+sqrt(c)),1/(sqrt(c)+sqrt(a)),1/(sqrt(a)+sqrt(b)) are in ...
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- let 0ltphiltpi/2, x=sum(n=0)^oocos^(2n)phi, y=sum(n=0)^oosin^(2n)phi a...
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- If first and eightth terms of a G.P. are x^(-4) and x^(52) and it...
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- Find the sum to n terms of the sequence : (i) (a+1/x)^(2), (x^(2)+1/...
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- If a ,b ,c are three distinct real numbers in G.P. and a+b+c=x b , the...
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- If S.P and R are the sum, product and sum of the reciprocals of n term...
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