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Question

The expression 14x+1[1+4x+12]7[1+4x+12]7 is a polynomial in x of degree ?

A
0
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B
4
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C
7
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D
Not defined
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Solution

The correct option is D Not defined
let 4x+1=y

Now 1y[[1+y2]7[1+y2]7]
now let [1+y2]=m

hence 1y[m7m7]=0

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