How do you use symbols to make the statement 4_5_2_7 = 107 true?

Answer 1

#4xx5^2+7#

It is a matter of 'playing' with combinations until you hit on one that works.

If we can use #4,5 and 2# to make 100 then all we need to do is add the 7.

I had several attempts using factorial to give a higher initial value. These failed. Then I hit upon the idea that we could do this:

#5^2xx4 ->25xx4=100#

Now all we need to do is add the 7. So putting it in the order given we have:

#4xx5^2+7#

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Answer 2

Hazel Anglin

To make the statement (4_5_2_7 = 107) true using symbols, you can insert mathematical operations between the numbers to achieve the desired result.

One possible solution is: (4 \times 5 - 2 \times 7 = 107).

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.