If x + 1/x = 5, the value of x² + 1/x² is: (CDS PYQ)
A21
B23
C25
D27
Question 2
If a + b + c = 0, then a³ + b³ + c³ equals: (CDS PYQ)
A0
Babc
C3abc
Da²b²c²
Question 3
The remainder when x³ − 3x + 2 is divided by (x + 2) is: (CDS PYQ)
A−4
B0
C2
D4
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