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Discrete Mathematics
Discrete Mathematics Multiple Choice
Quiz 1
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Q.1
Let AAbe two AM’s and GG2 be two GM’s between a and b,then (A1 + A/ G1G2 is equal to _______
a) (a+b) / 2ab
b) 2ab/(a+b)
c) (a+b)/(ab)
d) None of the mentioned
Q.2
The series a,(a+b)/b is in _______
a) AP
b) GP
c) HP
d) None of the mentioned
Q.3
The series a, (ab)1/b is in _______
a) AP
b) GP
c) HP
d) None of the mentioned
Q.4
If A and G be the A.M and G.M between two positive number then the numbers are A + (A2 – G2)1/ A – (A2 – G2)1/2.
a) True
b) False
Q.5
If one geometric mean G and two airthmetic mean AA2 are inserted between two numbers, then (2A1 – A(2A2 – Ais equal to _______
a) 2G
b) G
c) G2
d) None of the mentioned
Q.6
State whether the given statement is true or false.
a) True
b) False
Q.7
If between two numbers which are root of given equation. x2 –+=a GM is inserted then the value of that GM is?
a) 4
b) 5
c) 6
d) 16
Q.8
If aaaare in airthemetic as well as geometric progression then which of the following is/are correct?
a) 2a2 = a1 + a3
b) a2 = (a1a3)1/2
c) a2 – a1 = a3 -a2
d) All of the mentioned are correct
Q.9
If aaaare in GP then 1/a1/a1/a are in ___________
a) AP
b) GP
c) HP
d) None of the mentioned
Q.10
If aaa3…….. are in AP then if a7 =then the value of common difference that would make a2 a7 agreatest is?
a) 2
b) 0
c) 4
d) 9
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