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The value of (0.000001)1/3 is:
0.1
0.001
0.01
0.000001
0.01
Count the number of decimal places (6 decimal places), divide by the denominator of the fractional exponent (3), giving 6/3=2 decimal places. Since 11/3=1, the result is 0.01.
Expression: (0.000001)1/3
(am)n=am├Чn
Count the number of decimal places (6 decimal places), divide by the denominator of the fractional exponent (3), giving 6/3=2 decimal places. Since 11/3=1, the result is 0.01.
Students often confuse the cube root with the square root or miscount the number of zeros after the decimal point.
Step 1: Express the decimal as a fraction
Convert the decimal number 0.000001 into fractional form. Since there are 6 decimal places, it can be written as 1 over 1,000,000 (or 106).
0.000001=1,000,0001тАЛ=1061тАЛ
Step 2: Apply the fractional exponent
Substitute the fraction into the given expression with the power of 1/3, which represents taking the cube root.
(1061тАЛ)1/3=(106)(1/3)1(1/3)тАЛ
Step 3: Simplify the powers
Using the exponent law (am)n=am├Чn, multiply the exponent 6 by 1/3 to get 2.
106├Ч31тАЛ=102=100
Step 4: Convert back to decimal form
Calculate the final value as a decimal fraction: 1001тАЛ=0.01.
1001тАЛ=0.01
C is correct because the cube root of 0.000001 is 0.01.
Always convert numbers with decimal exponents into fractional powers or powers of 10 to simplify radical and exponential calculations quickly.