Answer all four questions.
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allysia:
32,33, 36 and 37 with explanation.
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Refer to the file attached below.
qu 32 is wrong. A/Q my ans is 2^m/2 and value of m is not given .
So I've edited that ques which would fetch u 2 as answer.
In Qu 33, my ans is (q² - p²)(1 - p²q²) which doesn't matches any option.
In qu 37 I've used fiitjee trick
put a= b= c= 2 and p= q= r= 3
these satisfy given condition
a^p = b^q = c^r = abc pqr = 3.3.3 = 27
now putting these value in options
a) p²q + q²r = 3².3 + 3².3 = 54 so this option is wrong
b) pq + pr + rp = 3.3 + 3.3 + 3.3 = 9+9+9 = 27 option b) is correct
c) (pq + qr + rp)² = (3.3+ 3.3 +3.3) ² = 27² = 729 wrong
d) pq(qr + rp) = 3.3 (3.3 + 3.3) = 9(9+9) = 9(18) = 162 so one too wrong
hence option B)
qu 32 is wrong. A/Q my ans is 2^m/2 and value of m is not given .
So I've edited that ques which would fetch u 2 as answer.
In Qu 33, my ans is (q² - p²)(1 - p²q²) which doesn't matches any option.
In qu 37 I've used fiitjee trick
put a= b= c= 2 and p= q= r= 3
these satisfy given condition
a^p = b^q = c^r = abc pqr = 3.3.3 = 27
now putting these value in options
a) p²q + q²r = 3².3 + 3².3 = 54 so this option is wrong
b) pq + pr + rp = 3.3 + 3.3 + 3.3 = 9+9+9 = 27 option b) is correct
c) (pq + qr + rp)² = (3.3+ 3.3 +3.3) ² = 27² = 729 wrong
d) pq(qr + rp) = 3.3 (3.3 + 3.3) = 9(9+9) = 9(18) = 162 so one too wrong
hence option B)
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Thank you.
Do u have any doubt in this ques?
I didn't understood the fitjee trick
are u indian...........I mean your name suggest u r foreigner......is that so?
well I've been fiitjeeian and there my teacher used to teach tricks to solve problems.
many times in mcqs we can simply put values. That fetches ans easily
provided conditions are being satisfied.
here I assumed a= b= c= 2 and p= q = r = 3 this made easy to tackle the problem. hope that u get my point.
Thanks for help
Answered by
1
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your answer is in the attachment
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