x. 6^12. 8^6= 2^30. 9^8
x. 2^12. 3^12.2^18= 2^30. 3^16
x. 2^30. 3^12= 2^30.3^16
=> x= 3^4
=> x= 81
x. 6^12. 8^6= 2^30. 9^8
x. 2^12. 3^12.2^18= 2^30. 3^16
x. 2^30. 3^12= 2^30.3^16
=> x= 3^4
=> x= 81
tìm x biết
1) x=-1/2 + 3/4 2) x - 1/5 = 2/11 3) x - 5/6 = 16/42 + -8/56
4) x/5 = 5/6 + -19/30 5) |x| - 1/4 = 6/18 6)x = -1/2 +3/4
7) x/15 = 3/5 + -2/3 8)11/8 + 13/6 = 85/x 9) x - 7/8 = 13/12
10) x - -6/15 = 4/27 11) -\(\dfrac{-6}{12}\)+ x = 9/48 12) x - 4/6 = 5/25 + -7/15
Ta có: (1/4)*(2/6)*(3/8)*(4/10)*(5/12)*...*(30/62)*(31/64)=2^x. Tìm x
1/4 x 2/6 x3/8 x 4/10 x 5/12 x....x 30/62 x 31/64=2n. Tìm n
tìm x biết :
(1/4).(2/6).(3/8).(4/10).(5/12)....(30/62).(31/64) = 2^x
Tìm x, biết \(\dfrac{1}{4}.\dfrac{2}{6}.\dfrac{3}{8}.\dfrac{4}{10}.\dfrac{5}{12}...\dfrac{30}{62}.\dfrac{31}{64}=2^x\)
x+9+5+6+8-12
Tìm x ?
ĐẠI SỐ 7
Rút gọn : A = 4^6 x 9^5 + 6^9 x 120 / 6^11 - 8^4 x 3^12
B = 2^12 x 3^5 - 4^6 x 9^2 / ( 2^2 x 3 )^6 + 8^4 x 3^5
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Ai làm dc thì giúp mình nheee )) Camon :))
Giải bất phương trình bài toán sau :
1. 8x-1/9 +3x-2/4<43+8x/12 + 35x/36
2. 5x-17/14+x-3/26 > 29-9x/91
3. x-2/5+2(x+1)/3 > 13x-8/15
4. x/30+1/6-x/5 > 2x/45+16
5. 8x+5/6+4x+3/6<3(x-2)/30
6. x+7/10-x-5/5>x-9/3
7. 9(x-1)-2(3x+4)<3(x-1)
8. x+7/4-2x-3/7<2x+3/8-8x+5/28
Câu 1: Tìm x,y,z biết 2x/3=3y/4=4z/5 và x-2y+3z=-31
Câu 2: Tìm x biết x-6/7+x-7/8+x-8/9=x-9/10+x-10/11+x-11/12
Câu 3: A =1/15+1/16+1/17+...+1/44
CMR: A>5/6