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Question

If x=1+2y2+y and y=1+2t2+t, then x equals

A
1+2t3+t
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B
3+2t2+3t
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C
5t+44t+5
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D
5t+66t+5
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Solution

The correct option is A 5t+44t+5
Given y=1+2t2+t
x=1+2y2+y Put the value of y
Then x=1+2(1+2t2+t)2+(1+2t2+t)

Or x=2+t+2+4t4+2t+1+2t

Or x=4+5t5+4t

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