Indicate whether the following expression is true or false:
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Indicate whether the following expression is true or false:
Begin by examining the problem:
Note that the expression on the left side cannot be simplified, despite the fact that both in the numerator and denominator there is the term . This is due to the fact that it is connected to the other term (both in numerator and denominator) and does not multiply it, therefore simplification - which is essentially applying the division operation which is the inverse operation of multiplication, is not possible, and therefore the current form of the expression on the left side:
is its final and most simplified form,
The term on the right side is:
Therefore the expressions on both sides of the (assumed) equality are not equivalent, meaning:
(In other words, there is no identical equality- that holds true for all possible values of the parameters )
Therefore, the correct answer is answer B.
Not true
Determine if the simplification shown below is correct:
\( \frac{7}{7\cdot8}=8 \)
You can only cancel factors (terms that multiply), not terms that are added. In , the 'a' is added to other terms, not multiplying the whole expression.
Cross-multiply! If , then (a+c) × b should equal c × (b+a). Expand both sides and compare.
Absolutely! Try a=1, b=2, c=3: Left side = , Right side = . Since , they're not equal!
With multiplication like , you can cancel the 'a'. With addition like , you cannot cancel because addition doesn't create common factors.
Only for specific values, not for all values of a, b, and c. The question asks if it's always true (an identity), which it's not.
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