化简 ((x 4 ) (-3)) × 2x 4
数学不仅与数字有关,而且与涉及数字和变量的不同计算有关。这就是基本上被称为代数的东西。代数被定义为涉及由数字、运算符和变量组成的数学表达式的计算的表示。数字可以是 0 到 9,运算符是数学运算符,如 +、-、×、÷、指数等,变量如 x、y、z 等。
指数和幂
指数和幂是数学计算中使用的基本运算符,指数用于简化涉及多次自乘的复杂计算,自乘基本上是数字与自身相乘。例如,7 × 7 × 7 × 7 × 7,可以简单地写成 7 5 。这里,7 是基值,5 是指数,值为 16807。11 × 11 × 11,可以写为 11 3 ,这里,11 是基值,3 是 11 的指数或幂。 11 3是 1331。
指数被定义为一个数字的幂,它乘以自身的次数。如果表达式写成 cx y其中 c 是常数,c 将是系数,x 是底数,y 是指数。如果一个数 p 乘以 n 次,n 将是 p 的指数。它将被写为
p × p × p × p … n 次 = p n
指数的基本规则
为了求解指数表达式以及其他数学运算,为指数定义了一些基本规则,例如,如果有两个指数的乘积,则可以简化以使计算更容易,称为乘积规则,让我们看一下指数的一些基本规则,
- 乘积规则 ⇢ a n × a m = a n + m
- 商规则 ⇢ a n / a m = a n – m
- 幂律 ⇢ (a n ) m = a n × m或m √a n = a n/m
- 负指数规则 ⇢ a -m = 1/a m
- 零规则 ⇢ a 0 = 1
- 一条规则 ⇢ a 1 = a
化简 ((x 4 )(-3)) × 2x 4 。
解决方案:
As it is clearly seen, the entire problem statement is asking for a simplification using exponent rules, looking at the expression ((x4) (-3)) × 2x4. it is observed that only a few steps are required to solve the equation. Let’s look at the steps,
Step 1: Rearrange the terms to place coefficients on the left.
= (-3 x4) × (2 x4)
Step 2: Eliminate parenthesis not required.
= -3x4 × 2x4
Step 3: Multiply the coefficients and bring the variables together.
= -6 x4 × x4
Step 4: Use rules of exponents to combine them, (Here, use product rule).
= -6 x(4 + 4)
= -6 x8
Therefore, the simplified form is -6 x8.
类似问题
问题 1:化简 ((y 6 ) (-2)) × -8y 4 。
解决方案:
As it is clearly seen, the entire problem statement is asking for a simplification using exponent rules, looking at the expression ((y6) (-2)) × -8y4. it is observed that only a few steps are required to solve the equation. Let’s look at the steps,
Step 1: Rearrange the terms to place coefficients on the left.
= (-2 y6) × (-8 y4)
Step 2: Eliminate parenthesis not required.
= -2y6 × -8y4
Step 3: Multiply the coefficients and bring the variables together.
= 16 y6 × y4
Step 4: Use rules of exponents to combine them, (Here, use product rule).
= 16 y(6 + 4)
= 16 y10
Therefore, the simplified form is 16 y10.
问题 2:简化 10(e x ) 2
解决方案:
As it is clearly seen, the entire problem statement is asking for a simplification using exponent rules, looking at the expression 10(ex)2, it is observed that x is the exponent of e and 2 is the exponent of ex, and 5 is constant, using the power rule of exponents, it can be written as,
Power Rule ⇢ (an)m = an × m
10(ex)2 = 10(ex × 2)
= 10(e2x)
问题 3:化简 [((y 7 ) (5))] ÷ [-5y 7 ]。
解决方案:
As it is clearly seen, the entire problem statement is asking for a simplification using exponent rules, looking at the expression [((y7) (5))] ÷ [-5y7]. it is observed that only a few steps are required to solve the equation. Let’s look at the steps,
Step 1: Rearrange the terms to place coefficients on the left.
= (5 y7) ÷ (-5 y7)
Step 2: Eliminate parenthesis not required.
= 5y7 ÷ -5y7
Step 3: Multiply the coefficients and bring the variables together.
= -25 y7 ÷ y7
Step 4: Use rules of exponents to combine them, (Here, use product rule).
= -25 y(7 – 7)
= -25 y0
= -25
Therefore, the simplified form is -25.