hoanghoai5476609 hoanghoai5476609

23-07-2021
Mathematics

contestada

cho x,y thuộc n thoả mãn x hia 3 dư 1,y chia 3 dư 2.hỏi x.y chia 3 có số dư bằng bao nhiêu

Respuesta :

dothiquynhanhk18dpt dothiquynhanhk18dpt

23-07-2021

Answer:

2

Step-by-step explanation:

x÷3 dư 1-->x=3a+1

y÷3 dư 2-->y=3b+2

x×y=(3a+1)×(3b+2)

=9ab+6a+3b+2

Mà 9ab, 6a, 3b chia hết cho 3, 2 chia 3 dư 1

==>x×y chia 3 dư 2

Answer Link

Otras preguntas

The challenge one on the other one couldn’t see so I made another photo lol plz help

why do you think scientists are trying to find out more about how and where early humans lived

what is the error? at 9am the temperature was -4 degress forienhieght by the noon the tempereture was -12 degress forienhight a newcaster said it was getting w

El cartero necesita la carta hoy. a. cheque c. pagar b. entregar d. estampilla

write nine hundred and fifty-two thousandths in standard form

Aspirin, yo-yo, and escalator were all brand names at one time. a. True b. False

Tell what the following people will do tomorrow by changing the verb in the following statement to the future tense. write the new verb in the blank. ustesed ha

Explain one example of a cultural exchange before the arrival of the europeans affecting the cultural develoomeny of an american indian group

Betty had $40 in her pocket. She bought 12 identical bags of popcorn. Betty was left with $10 after buying the popcorn .what was the price, in dollars, of each

Is 70 thousand written in standard form or word for? Explain