A) \[\frac{r}{mn}\]
B) \[\frac{mn}{r+1}\]
C) \[\frac{mn}{r}\]
D) \[\frac{mn}{r-1}\]
View Answer play_arrowA) 7
B) 6
C) \[-6\]
D) \[-7\]
View Answer play_arrowA) \[5\frac{1}{5}\]
B) \[3\frac{1}{5}\]
C) 1/10
D) 10
View Answer play_arrowA) \[{{a}_{1}}{{a}_{n}}\]
B) \[n{{a}_{1}}{{a}_{n}}\]
C) \[(n-1){{a}_{1}}{{a}_{n}}\]
D) None of these
View Answer play_arrowA) \[\log (x-z)\]
B) \[2\log (x-z)\]
C) \[3\log (x-z)\]
D) \[4\log (x-z)\]
View Answer play_arrowA) 1/89
B) 1/85
C) 1/80
D) 1/79
View Answer play_arrowA) 1/19
B) 1/29
C) 1/17
D) 1/27
View Answer play_arrowA) Greater than or equal to 10
B) Less than or equal to 10
C) Only equal to 10
D) None of these
View Answer play_arrowquestion_answer9) If \[a,\ b,\ c,\ d\] are in H.P., then \[ab+bc+cd\] is equal to
A) \[3ad\]
B) \[(a+b)(c+d)\]
C) \[3ac\]
D) None of these
View Answer play_arrowA) 16
B) 14
C) \[\frac{27}{14}\]
D) \[\frac{56}{15}\]
View Answer play_arrowA) \[\frac{1}{37}\]
B) \[\frac{1}{41}\]
C) \[\frac{1}{45}\]
D) \[\frac{1}{49}\]
View Answer play_arrowA) \[\frac{1}{28}\]
B) \[\frac{1}{39}\]
C) \[\frac{1}{6}\]
D) \[\frac{1}{17}\]
View Answer play_arrowA) 0
B) 1
C) pq
D) \[pq(p+q)\]
View Answer play_arrowA) \[\frac{1}{6}\]
B) \[\frac{3}{7}\]
C) \[\frac{1}{7}\]
D) \[\frac{3}{5}\]
View Answer play_arrowA) 2
B) \[\frac{pq}{p+q}\]
C) \[\frac{p+q}{pq}\]
D) None of these
View Answer play_arrowA) \[a+b\]
B) \[ab\]
C) \[\frac{1}{a}+\frac{1}{b}\]
D) \[\frac{1}{a}-\frac{1}{b}\]
View Answer play_arrowquestion_answer17) H.M. between the roots of the equation \[{{x}^{2}}-10x+11=0\] is [MP PET 1995]
A) \[\frac{1}{5}\]
B) \[\frac{5}{21}\]
C) \[\frac{21}{20}\]
D) \[\frac{11}{5}\]
View Answer play_arrowA) \[\frac{a}{\sqrt{1-{{a}^{2}}{{b}^{2}}}}\]
B) \[\frac{a}{1-{{a}^{2}}{{b}^{2}}}\]
C) \[a\]
D) \[\frac{1}{1-{{a}^{2}}{{b}^{2}}}\]
View Answer play_arrowquestion_answer19) The sixth H.M. between 3 and \[\frac{6}{13}\] is [RPET 1996]
A) \[\frac{63}{120}\]
B) \[\frac{63}{12}\]
C) \[\frac{126}{105}\]
D) \[\frac{120}{63}\]
View Answer play_arrowA) 1
B) \[-1\]
C) 0
D) 2
View Answer play_arrowA) 4
B) 2
C) 1
D) \[a+b\]
View Answer play_arrowquestion_answer22) If \[a,\ b,\ c\] be in H.P., then
A) \[{{a}^{2}}+{{c}^{2}}>{{b}^{2}}\]
B) \[{{a}^{2}}+{{b}^{2}}>2{{c}^{2}}\]
C) \[{{a}^{2}}+{{c}^{2}}>2{{b}^{2}}\]
D) \[{{a}^{2}}+{{b}^{2}}>{{c}^{2}}\]
View Answer play_arrowquestion_answer23) If \[a,\ b,\ c,\ d\] are in H.P., then [RPET 1991]
A) \[a+d>b+c\]
B) \[ad>bc\]
C) Both (a) and (b)
D) None of these
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