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When 2x + 2 = 3 , then value of 
x3 + 1 + 2 
is x x3
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2 7
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7 8
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7 2
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8 7
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Correct Option: B
| 2x + | = 3 | |
| x |
On dividing by 2,
| x + | = | ||
| x | 2 |
On cubing both sides,
| ⇒ | | x + | | 3 | = | ||
| x | 8 |
| ⇒ x3 + | + 3 | | x + | | = | |||
| x3 | x | 8 |
| ⇒ x3 + | + | = | ||||
| x3 | 2 | 8 |
| ⇒ x3 + | = | - | ||||
| x3 | 8 | 2 |
| ⇒ x3 + | = | ||
| x3 | 8 |
| ⇒ x3 + | = | ||
| x3 | 8 |
| ∴ x3 + | + 2 = 2 - | = | = | ||||
| x3 | 8 | 8 | 8 |
