Bµi 2: T×m gi¸ trÞ LN – NN cña c¸c hµm sè: a) 1 1
2 + +
+ = x x
x
y . b) y = 2 1 5
1
+ x .

Find the least common multiple of 8 and 40 which is 40. The denominator will be 40. For 8 to get to 40 we have to multiply the top number by five since 8 x 5 is 40.

So we will have:

5/40

9/40 already has 40 as its denominator so we will keep the fraction like that:

5/40 + 9/40 = 14/40

14/40 can be simplified by 2.

7/20

So the answer is 7/20.

Hope this helped, have an awesome day! <3