Question

4^1/2 - (1/2)^2 + 2^-3 вычислить

Answer 1

${4}^{ \frac{1}{2} } - ( \frac{1}{2}) ^{2} + {2}^{ - 3} = \\ = 2 - \frac{1}{4} + \frac{1}{8} = 2 - \frac{1}{8} = 1 \frac{7}{8}$

Answer 2

2-0.25+0.125=1.875 как-то так

Answer 3

To calculate the expression, let's follow the order of operations (PEMDAS - Parentheses, Exponents, Multiplication and Division, Addition, and Subtraction):

1. Simplify the exponents:

   • 4^(1/2) = √4 = 2
   • (1/2)^2 = (1/4)

2. Evaluate the expression: 2 - (1/4) + 2^(-3)

Now, let's calculate 2^(-3):

2^(-3) = 1 / 2^3 = 1 / 8

Now, substitute this back into the expression:

2 - (1/4) + 1/8

Next, we need to find a common denominator for (1/4) and (1/8), which is 8:

2 - 2/8 + 1/8

Now, we can combine the fractions:

2 - (2 + 1) / 8 2 - 3/8

To simplify further, let's find a common denominator for 2 and 3/8, which is 8:

16/8 - 3/8

Now, subtract the fractions:

(16 - 3) / 8 13 / 8

So, the final result is 13/8.