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Question

If A=α2α2 & A3=125 then the value of α is


A

±1

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B

±2

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C

±3

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D

±5

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Solution

The correct option is C

±3


Explanation for the correct otpion:

Finding the value of α:

Given,

A=α22α & A3=125

Now,

A=α2-4 &

A3=125A=5

Therefore,

5=α2-49=α2α=±3

Hence, correct option is (C)


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