Question

${[x+\sqrt{x^3-1}]}^5+{[x-\sqrt{x^3-1}]}^5$ is a polynomial of the order of

• A. 5
• B. 6
• C. 7
• D. 8

Answer 1

The correct option is A 5

Degree is the highest power of the polynomial.

${[x+\sqrt{x^3-1}]}^5+{[x-\sqrt{x^3-1}]}^5$

$\because$ highest power of $x=5$

$\therefore$ order of polynomial $=5$.