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Marysya12 [62]
3 years ago
7

Is a rational number? Why or why not?

7} " alt=" \sqrt{7} " align="absmiddle" class="latex-formula">
​
Mathematics
2 answers:
PtichkaEL [24]3 years ago
6 0

Answer: Irrational or not rational

Step-by-step explanation:

square root of 7 is 2.64575131

Rational numbers are numbers that can be expressed in fractions.

Square root of 7 can't be made by dividing 2 integers.

lions [1.4K]3 years ago
5 0

Answer:

No, it is a irrational number

Step-by-step explanation:

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6,666,666×666,666 /1+2+3+4+5+6+5+4+3+2+1 − 777,777×777,777/1+2+3+4+5+6+7+6+5+4+3+2+1
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111111 \times 1111110 is the simple expression.

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The expression to be solved:

\dfrac{6,666,666\times666,666 }{1+2+3+4+5+6+5+4+3+2+1} - \dfrac{777,777\times777,777}{1+2+3+4+5+6+7+6+5+4+3+2+1}

First of all, let us solve the first term:

\dfrac{6,666,666\times666,666 }{1+2+3+4+5+6+5+4+3+2+1}\\\Rightarrow \dfrac{6666666\times666666 }{36}\\\Rightarrow \dfrac{6666666\times666666 }{6\times 6}\\\Rightarrow 1111111\times 111111

Now, the right term:

\dfrac{777777\times777777}{1+2+3+4+5+6+7+6+5+4+3+2+1}\\\Rightarrow \dfrac{777777\times777777}{49}\\\Rightarrow \dfrac{777777\times777777}{7 \times 7}\\\Rightarrow 111111 \times 111111

So, the expression to be solved becomes:

1111111\times 111111-111111\times 111111\\\Rightarrow 111111(1111111-1)\\\Rightarrow 111111\times 1111110

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