Question Detail
Question
In the expansion of (1 - x)^(1/4) up to x^7, evaluate 77^(1/4) correct to five significant figures.
Correct Answer
Option A is the correct answer.
Detailed Explanation
Write 77 = 81*(1 - 4/81), expand (1 - x)^(1/4) using binomial theorem, sum up terms → 3.9306
Hint
Factor out a perfect fourth power, use binomial series for small x.