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Dharmender

· started a discussion

· 1 Months ago

Wrong options (Question: 398329.0 )

‘a’ and ‘b’ are integers of opposite sign ka meaning h ki if a= +ve then b= -ve and vice versa
Fir to option A bhi halat h or baaki saare bhi

Question:

If a and b are integer of opposite signs such that (a + 3)2 : b2 = 9 : 1 and (a – 1)2 : (b – 1)2 = 4 : 1 then the ratio of a2 : b2 is –

Options:
A)

9 : 4

B)

81 : 4

C)

1 : 4

D)

25 : 4

Solution:

Ans: (d)


Hari singh

· commented

· 1 Months ago

Yet to be approved!

Knowledge Expert

· commented

· 1 Months ago

Dear Student
Upon solving the question truly their are two possibilities for the values of a (3 and 15)
and for b(2,-6)
So the first ratio that can come 3/2 and the result is 9/4
The second ratio is 5/-2 and thus the result is 25/4
Given in the question that both variable a and b should be of the opposite signs , which is only apparent in the second case of a =15, b=-6
Thus the correct answer is (d)
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