Math Problem Statement

حل بکن

حل بکن

Solution

The given mathematical expression is:

(1)3+(23)2((4)3)11.\frac{(-1)^3 + (-\frac{2}{3})^{-2}}{((-4)^{-3})^{-1} - 1}.

Let us solve it step by step:


Step 1: Simplify the numerator

The numerator is:
(1)3+(23)2.(-1)^3 + (-\frac{2}{3})^{-2}.

  1. (1)3=1(-1)^3 = -1.
  2. (23)2(-\frac{2}{3})^{-2}:
    Recall that for xnx^{-n}, xn=1xnx^{-n} = \frac{1}{x^n}. Thus:
    (23)2=1(23)2=149=94.(-\frac{2}{3})^{-2} = \frac{1}{(-\frac{2}{3})^2} = \frac{1}{\frac{4}{9}} = \frac{9}{4}.

So, the numerator becomes:
1+94=44+94=54.-1 + \frac{9}{4} = \frac{-4}{4} + \frac{9}{4} = \frac{5}{4}.


Step 2: Simplify the denominator

The denominator is:
((4)3)11.((-4)^{-3})^{-1} - 1.

  1. Simplify (4)3(-4)^{-3}:
    (4)3=1(4)3=164=164.(-4)^{-3} = \frac{1}{(-4)^3} = \frac{1}{-64} = -\frac{1}{64}.

  2. (4)3)1(-4)^{-3})^{-1}:
    Using the rule (xa)b=xab(x^{-a})^{-b} = x^{ab},
    (164)1=64.(-\frac{1}{64})^{-1} = -64.

Thus, the denominator becomes:
641=65.-64 - 1 = -65.


Step 3: Final computation

The entire expression is:
5465.\frac{\frac{5}{4}}{-65}.

Simplify:
54÷65=54(65)=5260=152.\frac{5}{4} \div -65 = \frac{5}{4 \cdot (-65)} = \frac{5}{-260} = -\frac{1}{52}.


Final Answer

152\boxed{-\frac{1}{52}}

Let me know if you'd like a detailed explanation of any step! 😊


Here are 5 questions that expand on this topic:

  1. How would the answer change if the numerator included a different power, such as (1)5(-1)^5?
  2. Can you prove the general rule for xn=1xnx^{-n} = \frac{1}{x^n}?
  3. How do negative bases affect even vs. odd exponents?
  4. What happens if the denominator changes to include a fraction instead of an integer?
  5. How is this problem related to exponent rules in logarithms?

Tip: Always check for negative signs when dealing with powers and fractions—they often lead to common errors!

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Math Problem Analysis

Mathematical Concepts

Exponentiation
Fractions
Negative Exponents
Simplification of Expressions

Formulas

x^(-n) = 1/(x^n)
(a/b)^n = a^n / b^n
Multiplication and addition of fractions

Theorems

Exponent Rules

Suitable Grade Level

Grades 9-12