Elementary Mathematics || Quiz-21 || CDS

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Question 1

For what value of k, the expression x⁶ −18x³ +k will be a perfect square?

• A- 9
• B- 81
• C+ 9
• D+ 81

Question 2

If α and β are the roots of equation x²-x-1=0, then find the value of α⁴ + β⁴?

• A7
• B2
• C9
• D14

Question 3

If x, y, and z are distinct positive real numbers, then would be

• A>5
• B≥6
• C>6
• D>4

Question 4

If a,b,c are positive real numbers, then = ?

• A2
• B1
• C- 1
• D0

Question 5

Simplify log₂16 + log_1/216 – log₄16

• A-2
• B-1
• C1
• D2

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