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If (p-1),(p-2),(3p-1)are in Ap,then p is …

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If (p-1),(p-2),(3p-1)are in Ap,then p is equal to : 1.(4) 2.(-4) 3.(2) 4.(-2)

Posted by Love Rathore 5 years, 2 months ago

CBSE > Class 10 > Mathematics

5 answers

Riya Philip 5 years, 2 months ago

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Yogita Ingle 5 years, 2 months ago

If you write p + 3 in place of p -2 then the answer is 4.

p−1,p+3,3p−1 are in A.P.

∴2(p+3)=p−1+3p−1

⇒2p+6=4p−2

⇒2p=8

∴p=4

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Abhay Soni 5 years, 2 months ago

(p -2) - (p -1) = (3p -1) - (p -2) p -2 - p + 1 = 3p - 1 - p + 2 -1 = 2p + 1 2p = -1 -1 2p = -2 p = -2/2 = -1

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Love Rathore 5 years, 2 months ago

But answer is 4

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Yogita Ingle 5 years, 2 months ago

(p -2) - (p -1) = (3p -1) - (p -2)

p -2 - p + 1 = 3p - 1 - p + 2
-1 = 2p + 1

2p = -1 -1

2p = -2

p = -2/2 = -1

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