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If a + 2√3, find the value of a3 . a6 + 3a3 + 1
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- 55
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1 55 -
1 40 -
3 55
Correct Option: B
a = 2 + √3
∴ | = | ||
a | 2 + √3 |
= | = | ||
(2 + √3)(2 - √3) | 4 - 3 |
= 2 - √3
Now,
= | = | ||
a6 + 3a³ + 1 | 3a³ + 3 + 1/a³ |
[Dividing numerator and denominator by a³]
= | |||
a³ + | + 3 | ||
a³ |
= | ||||||||||
![]() | a + | ![]() | ³ | - 3 | ![]() | a + | ![]() | + 3 | ||
a | a |
= | ||
(4)³ - 3(4) + 3 |
= | = | ||
(4)³ - 3(4) + 3 | 55 |