Practice mode / Surds and Indices If 5a = 3125, then the value of 5(a – 3) is: A Option A: 25 B Option B: 125 C Option C: 625 D Option D: 1625 Correct answer A. 25 Show answer Report a problem How we write and check questions
Question 01 / Surds and Indices If 9^x − 9^(x − 1) = 216, what is the value of x? A Option A: 3 B Option B: 3/2 C Option C: 2 D Option D: 5/2 Correct answer D. 5/2 Show answer Open question
Question 02 / Surds and Indices If x = 3 + 2√2, what is the value of x + 1/x? A Option A: 3 B Option B: 6 C Option C: 6 + 4√2 D Option D: 4√2 Correct answer B. 6 Show answer Open question
Question 03 / Surds and Indices What is the value of 81^(0.25) × 81^(0.5)? A Option A: 9 B Option B: 243 C Option C: 3 D Option D: 27 Correct answer D. 27 Show answer Open question
Question 04 / Surds and Indices What is the value of (0.04)^(−1.5)? A Option A: 125 B Option B: 625 C Option C: 25 D Option D: 0.008 Correct answer A. 125 Show answer Open question
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