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Question is:
Evaluate 2/x+2 + 3/2x+1 when x= ½
back of the book says 2 and three tens i.e 2 3/10
Evaluate 2/x+2 + 3/2x+1 when x= ½
back of the book says 2 and three tens i.e 2 3/10
Did you not understand spamiam's comment about parentheses? You seem to have glossed right over it.i know, i checked the back of the book and it says the answer is 2 3/10
1.Use parentheses when a numerator or denominator (or both) have two or more terms.this is how im doing it:
2/x+2 + 3/2x+1
=> 2/½+2 + 3/2(½)+1
=> 2/2½ + 3/2, get LCM of 2½ and 2, which is 10
=> 10(2)/2½ + 10(3)/2
=> 4(2) + 5(3)
=> 8 + 15 = 23
and i did it another way where i got 1 1/9
but i can't seem to get 2 3/10
nah, i didn't, i had no idea you had to put it in parentheses when you had more than one term in either the numerator or the denominator.Did you not understand spamiam's comment about parentheses? You seem to have glossed right over it.
nice job, thanks1.Use parentheses when a numerator or denominator (or both) have two or more terms.
2. Do not use => (implies) when you mean = (equals).
If x = 1/2, then 2/(x + 2) + 3/(2x + 1) = 2/(5/2) + 3/2 = 2 * 2/5 + 3/2 = 4/5 + 3/2
Now, the LCM of 5 and 2 is 10, so multiply the first fraction by 2/2 and the second by 5/5. After you do this, you will be able to combine the two fractions.
The answer in the book is correct.
The problem is that when you write 2/x + 2 + 3/2x + 1, knowledgeable people will probably interpret this asnah, i didn't, i had no idea you had to put it in parentheses when you had more than one term in either the numerator or the denominator.
You're welcome!nice job, thanks
It didn't, but 2/(1/2 + 2) = 2/(5/2)only bit i dont understand is why and how 2/(½+1) became 2/(5/2)
The goal is to get you to learn from your mistakes.and i apologize for my idiocy thus far