Tính :
a) A = \(\frac{72^3x54^2}{108^4}\)
b) B = \(\frac{3^{10}x11+3^{10}x5}{3^9x2^4}\)
c) C = \(\frac{2^{10}x13+2^{10}x15}{2^8x104}\)
Giúp mk với ! T_T
Những câu hỏi liên quan
a)Cho A=4+\(^{2^2+2^3+2^4}\)+...+\(2^{20}\).Hỏi A có chia hết cho 128 không?
b)Tính giá trị biểu thức:\(\frac{2^{12}x13+2^{12}x65}{2^{10}104}\)+\(\frac{3^{10}x11+3^{10}x5}{3^9x2^4}\)
B = \(\frac{2^{10}x13+65x2^{10}}{2^8x104}\)
\(B=\frac{2^{10}.13+65.2^{10}}{2^8.104}\)
\(B=\frac{2^8.2^2\left(13+65\right)}{2^8.104}\)
\(B=\frac{2^2.3.26}{2^2.26}\)
B = 3
Đúng 0
Bình luận (0)
Tính giá trị các biểu thức
A=\(\frac{3^{10\ \ }.11+3^{10\ \ }.5}{3^{9\ }.2^{^4}\ }\)
B= \(\frac{2^{10}.13+2^{10\ }.65}{2^8.104}\)
C=\(\frac{72^3.54^2}{108^4}\)
D=\(\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
\(A=\frac{3^{10}.11.3^{10}}{^{ }3^9.2^4}\)
\(B=\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(C=\frac{72^3.54^2}{108^4}\)
\(D=\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
Bài3Tính giá trị biểu thức
a) A=\(\frac{3^{10}.11+3^{10}.5}{3^9.2^4}\)
b) B=\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
c) C=\(\frac{72^3.54^2}{108^4}\)
d) D=\(\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
A= 3^10.( 11+5 ) / 3^9. 2^4
A= 3^10. 16 /3 ^9 . 16
A= 3^10/3^9= 3
B= 2^10. ( 13 +65) / 2^8.104
B= 2^10. 78/ 2^8.104
B= 2 ^10.2.39/ 2^8 .2.52
B= 2^11.39/ 2^9.52
B= 2 ^ 2. (39/ 52)
B= 4 . 39/52 = 3
C= (2^3.3^2)^3.( 2.3.3^2 )^2 / (2^2.3^3)^4
C= 2^9.3^6/ 2^2.3^2.3^4
C= 2^9.3^6/ 2^2.3^6
C= 2^9/2^2= 2^5=32
D= 11.3^29-3^30/ 2^2.3^28
D= 3^29.(1- 3)/ 2^2.3^28
D= 3^29.(-2)/ 2^2.3^28
D= 3. (-2/2^2)
D = 3. (-1/2)= -3/2
Đúng 0
Bình luận (0)
A=\(\frac{3^{10}.11+3^{10}.5}{3^9.2^4}\)
B=\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
C=\(\frac{72^3.54^2}{108^4}\)
D=\(\frac{11.3^{22}.3^7-9^{15}}{\left(2.3^{14}\right)^2}\)
Gợi ý
bn thực hiện phép tính tử mẫu bình thường , khi ra nhưng số trùng nhau bn gạch ra nháp cho đến nhưng số tối giản là ra nha
chúc bn
học tốt
Đúng 0
Bình luận (0)
A = \(\frac{3^{10}.11+3^{10}.5}{3^9.2^4}\)
= \(\frac{3^{10}\left(11+5\right)}{3^9.2^4}\)
= \(\frac{3^{10}.16}{3^9.2^4}\)
= \(\frac{3^{10}.2^4}{3^9.2^4}=3\)
B = \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
= \(\frac{2^{10}\left(13+65\right)}{2^8.104}\)
= \(\frac{2^{10}.78}{2^8.104}\)
= \(\frac{2^{10}.13.2.3}{2^8.2^3.13}\)
= \(\frac{2^{11}.13.3}{2^{11}.13}=3\)
Đúng 0
Bình luận (0)
C = \(\frac{72^3.54^2}{108^4}\)
= \(\frac{\left(2^3.3^2\right)^3.\left(2.3^3\right)^2}{\left(2^2.3^3\right)^4}\)
= \(\frac{2^9.3^6.2^2.3^6}{2^8.3^{12}}\)
= \(\frac{2^{11}.3^{12}}{2^8.3^{12}}\)
= \(2^3=8\)
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
Tính giá trị các biểu thức
a)A = \(\frac{72^3.54^2}{108^4}\) b) B = \(\frac{3^{12}.13+3^{12}.3}{3^{11}.2^4}\) c) C = \(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
Tính:
a. A=\(\frac{72^3.54^2}{108^4}\)
b. B=\(\frac{3^{10}.11+3^{10}.5}{3^9.2^{^4}}\)
c.\(C=\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
d. (1+2+3+.....+100).(\(1^2+2^2+3^2+.......+100^2\)).(65.111-13.15.37)
tính giá trị biểu thức :
a)\(\frac{6^{10}.27^5}{4^5.81^6}\)
b) \(\frac{72^3.54^2}{108^4}\)
c)\(\frac{27^4.2^3-3^{10}.4^3}{6^4.9^34}\)
a) \(\frac{6^{10}.27^5}{4^5.81^6}=\frac{\left(2.3\right)^{10}.\left(3^3\right)^5}{\left(2^2\right)^5.\left(3^4\right)^6}=\frac{2^{10}.3^{10}.3^{15}}{2^{10}.3^{24}}=\frac{2^{10}.3^{25}}{2^{10}.3^{24}}=\frac{3^{25}}{3^{24}}=3\)
b) \(\frac{72^3.54^2}{108^4}=\frac{\left(2^3.3^2\right)^3.\left(2.3^3\right)^2}{\left(2^2.3^3\right)^4}=\frac{2^9.3^6.2^2.3^6}{2^8.3^{12}}=\frac{2^{11}.3^{12}}{2^8.3^{12}}=\frac{2^{11}}{2^8}=2^3=8\)
c) \(\frac{27^4.2^3-3^{10}.4^3}{6^4.9^3.4}=\frac{\left(3^3\right)^4.2^3-3^{10}.\left(2^2\right)^3}{\left(2.3\right)^4.\left(3^2\right)^3.2^2}=\frac{3^{12}.2^3-3^{10}.2^6}{2^4.3^4.3^6.2^2}\)
= \(\frac{3^{12}.2^3-3^{10}.2^6}{2^6.3^{10}}=\frac{3^{12}.2^3}{2^6.3^{10}}-\frac{3^{10}.2^6}{2^6.3^{10}}=\frac{3^2}{2^3}-1=\frac{9}{8}-1=\frac{1}{8}\)
Đúng 0
Bình luận (0)