47
Q:

Find the quadratic equations whose roots are the reciprocals of the roots of 2x2+5x+3?

A)  3x2+5x+2=0   

B) 5x2+3x+2=0 

C) 3x2-5x-2=0   

D)  None



A) A B) B
C) C D) D

Answer:   A) A



Explanation:

The quadratic equation whose roots are reciprocal of 2x2+5x+3=0 can be obtained by replacing x by 1/x.

 

Hence, 2(1/x)(1/x)+ 5(1/x) + 3 = 0

 

=> 3x2+5x+2=0

 

 

Subject: Mathematical Operations
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Q:

Find the missing number?

A) 13 B) 17
C) 84 D) 98
 
Answer & Explanation Answer: A) 13

Explanation:
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0 860
Q:

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
25 + 10 ÷ 240 x 16 = ?

A) 85 B) 235
C) 12 D) 20
 
Answer & Explanation Answer: B) 235

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2 1159
Q:

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
24 x 6 - 8 + 2 = ?

A) 25 B) 50
C) 40 D) 20
 
Answer & Explanation Answer: D) 20

Explanation:
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2 1095
Q:

In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-'. What is the answer to the following question?
642 x 6 ÷ 25 + 4 = ?

A) 11 B) 64
C) 18 D) 7
 
Answer & Explanation Answer: D) 7

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0 784
Q:

Find the missing number?

A) 11 B) 31
C) 32 D) 37
 
Answer & Explanation Answer: B) 31

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10 1291
Q:

Find the missing number?

A) 32 B) 36
C) 44 D) 47
 
Answer & Explanation Answer: D) 47

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1 889
Q:

Find the missing number?

A) 39 B) 48
C) 52 D) 58
 
Answer & Explanation Answer: D) 58

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0 827
Q:

If "A" denotes "subtracted from", "B" denotes "added to", "C" denotes "divided by", "D" denotes "multiplied by", then which of the following statement is correct?

A) 3 A 12 B 16 D 17 C 1 = 163 B) 5 C 7 A 9 D 8 B 2 = 294
C) 13 C 13 A 13 B 13 D 13 = 157 D) 18 C 16 D 49 A 27 B 9 = 200
 
Answer & Explanation Answer: C) 13 C 13 A 13 B 13 D 13 = 157

Explanation:
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10 2570