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Answers
1) Answer:5/7 =0.7142857143
9/11=0.8181818182
STEP-by-step explanation: What you need is a simple general method for producing irrationals.
You know all irrationals have non repeating non terminating decimal representations.
So, create some patterns that will meet the stated criteria, then generalize them
Number numbers.
0.1234567891011121314151617181920212223…
Simple expansion is to do the same in different bases. 0.1101110010111011110001001101010111100…
0.12101112202122100101102110111112120…
Do it in powers
0.24816326412825651210242048…
0.392781243…
Do it with primes
0.235711131719232931…
Now for your case 5/7 =0.7142857143
9/11=0.8181818182
2) There are infinitely many irrational numbers whose product is a rational number.
One example is 2–√ and 22–√ .
Those are both irrational, but their product, 2–√⋅22–√=4 , is clearly rational.
Second Example is √5×√5 = 5
Answer: