Question

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Q.13 lf (x - 1)3 = 8, then the value of (x + 1)2 is .................
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Answer 1

Here, (x-1)³=8

or, (x-1)³=2³

or, x-1 =2

or, x=3

Now, (x+1)² = (3+1)²

= 4² = 16 Ans.