I don't now
or no I don't
..................
sorry
I don't now
or no I don't
..................
sorry
\(Cho\frac{a}{b}=\frac{c}{d}\)
\(CMinh\frac{3a-4c}{3b-4d}=\frac{5a-6c}{5b-6d}\)
chứng minh rằng:
3a-4c/3v-4d = 5a+6c/5b+6d
CMR
-(-4a+5c-3b)-(2b-a+7c)+(-7b+3c-5a)=-9c-6b
-(2a-3c+b)+(-5b-4c+12a)-(-9b-4c+4a)+(-6a-3b-3c)+d=d
Cho 4a+5b+6c chia het cho11 CMR 5a+9b+6c chia het cho11
Cho 3 số nguyên a;b;c. Hỏi 3 số a^3b^4c^2;a^8b^6c;a^5b^2c^3
Thu gọn biểu thức:
a) 2.( a-3b+5b) + (-3a-7c+5c) -4b b)7.(-a-2b+c)+3.(-2c-6b+a)
c)2.(-3c-6b+7b)-4.(2a-3b+8c) d) -3.(2a+3b-4c)+7.(-2c+8a-2c)+20a+2a+24b
e)-(5a-6b+c)+3.(-2c-6b+a)
Cho a / b = c / d. Chứng minh \(\frac{5a+4c}{5b+4d}=\)\(\frac{2a-c}{2b-d}\)
cho 3a+5b chia hết cho 19.CMR 5a+2b chia hết cho 19
cho 3a+5b chia hết cho 19.CMR 5a+2b chia hết cho 19