化简 2m 2 ×(2m 3 )
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
什么是 2m 2 (2m 3 )?
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 2m2(2m3), it is observed that the product rule of exponents can be easily applied to this expression,
Step 1: Remove the parenthesis and write terms with their exponents.
2m2(2m3) = 2m2 × 2m3
Step 2: Apply the Product rule of exponents.
Product Rule ⇢ an × am = an + m
2m2 × 2m3 = 2m(2 + 3)
Therefore, 2m5 is the value obtained.
类似问题
问题1:什么是9m 5 (8m 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 9m5(8m7), it is observed that the product rule of exponents can be easily applied to this expression,
Step 1: Remove the parenthesis and write terms with their exponents.
9m5(8m7) = 9m5 × 8m7
Step 2: Apply the product rule of exponents.
Product Rule ⇢ an × am = an + m
9m5 × 8m7 = 9 × 8m(5 + 7)
Therefore, 72m12 is the value obtained.
问题 2:化简 (x 7 )(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 (x7)(x2), it is observed that the product rule of exponents can be easily applied to this expression,
Product Rule ⇢ an × am = an + m
x7 × x2 = x(7 + 2)
= x9
Therefore, x40 is the value obtained.
问题 2:化简 50(x 0 )(x 9 )
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 50(x0)(x9), it is observed that the product rule of exponents can be easily applied to this expression,
Product Rule ⇢ an × am = an + m
50[x0 × x9] = 50x(0 + 9)
= 50x9
Therefore, 50x9 is the value obtained.