If in a progression a1, a2, a3, e t cdo...

If in a progression `a_1, a_2, a_3, e t cdot,(a_r-a_(r+1))` bears a constant atio with `a_rxxa_(r+1)` , then the terms of the progression are in a. A.P b. G.P. c. H.P. d. none of these

A.P.

G.P.

H.P.

none of these

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If a_1, a_2, ,a_n are in H.P., then (a_1)/(a_2+a_3++a_n),(a_2)/(a_1+a_3++a_n), ,(a_n)/(a_1+a_2++a_(n-1)) are in a. A.P b. G.P. c. H.P. d. none of these

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OBJECTIVE RD SHARMA ENGLISH-SEQUENCES AND SERIES-Chapter Test

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If in a progression a1, a2, a3, e t cdot,(ar-a(r+1)) bears a constant...
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If in an AP, t1 = log10 a, t(n+1) = log10 b and t(2n+1) = log10 c then...
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Find the sum of the series: 1^2-2^2+3^2-4^2+.....-2008^2+2009^2.
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If Sn denotes the sum of n terms of an A.P. whose common difference is...
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The sides of a right angled triangle are in A.P., then they are in the...
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Find the sum of all the 11 terms of an AP whose middle most term is 30...
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The maximum sum of the series 20+19 1/3+18 2/3+ is 310 b. 300 c. 0320 ...
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If three numbers are in G.P., then the numbers obtained by adding the ...
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If p ,q ,r are in A.P., show that the pth, qth and rth terms of any G....
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Let a,b,c be three positive prime number. The progrrssion in which sqr...
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If 1/(b-a)+1/(b-c)=1/a+1/c , then (A). a ,b ,a n dc are in H.P. (B). a...
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If three numbers are in H.P., then the numbers obtained by subtracting...
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The first three of four given numbers are in G.P. and their last three...
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In a G.P. of positive terms if any terms is equal to the sum of next ...
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If a,b,c are in H.P and ab+bc+ca=15 then ca=
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If sum(r=1)^(oo)(1)/((2r-1)^(2))=(pi^(2))/(8), then sum(r=1)^(oo) (1)/...
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It is given that 1/1^4 + 1/2^4 +1/3^4 … to oo= pi^4/90 , then 1/1^4...
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