rút gọn biểu thức 16 . 17 - 5/ 16 .16 + 11
Rút gọn biểu thức : 28 mũ 15 nhân 3 mũ 17 trên 84 mũ 16
28^15x3^17/84^16
=28^15x3^17/(28x3)^16
=28^15x3^17/28^16x28^16
=3/28
Rút gọn biểu thức:
\(\frac{28^{15}.3^{17}}{84^{16}}\)\(=\frac{\left(2^2.7\right)^{15}.3^{17}}{\left(2^2.3.7\right)^{16}}\)
\(=\frac{2^{30}.7^{15}3^{17}}{2^{32}.3^{16}7^{16}}\)
\(=\frac{3}{2^2.7}=\frac{3}{28}\)
Rút gọn rồi tính: \(a.\frac{16}{24}-\frac{1}{3}=\frac{2}{3}-\frac{1}{3}=\frac{1}{3}\)
\(b.\frac{4}{5}-\frac{12}{60}=\frac{4}{5}-\frac{1}{5}=\frac{3}{5}\)
Tính rồi rút gọn:
\(a.\frac{17}{6}-\frac{2}{6}=\frac{15}{6}\)
\(b.\frac{16}{15}-\frac{11}{15}=\frac{5}{15}=\frac{1}{3}\)
\(c.\frac{19}{12}-\frac{13}{12}=\frac{6}{12}=\frac{1}{2}\)
1a2/3-1/3=1/3 c4/5-1/5=3/5 tinh roi rut gon 17/6-2/6=15/6=5/2 16/15-11/15=5/15=1/3 19/12-13/12=6/12=1/2
chuc bn hoc tot
Rút gọn biểu thức sau :
A= ( 3 .4 . 1216)2 / 11 .213 . 411 - 169
rút gọn biểu thức sau
3 .16 /12.9
11.5 -11.7 /11
6 /11 - 6/9 +6 /5 /21/11- 21/9+21/5
Rút gọn: 1 1 - 2 - 1 2 - 3 + 1 3 - 4 - 1 4 - 5 + 1 5 - 6 - 1 6 - 7 + 1 7 - 8 - 1 8 - 9
Rút gọn biểu thức: \(\frac{28^{15}.3^{17}}{84^{16}}\)
=\(\frac{7^{15}.2^{30}.3^{17}}{7^{16}.3^{16}.2^{32}}\)=\(\frac{3}{7.3.2^2}\)=\(\frac{1}{7.2^2}\)=\(\frac{1}{28}\)
hoàng thảo linh làm sai mà
rút gọn biểu thức:
\(5\sqrt[3]{2}+\sqrt[3]{-16}+\sqrt[3]{54}\)
\(5\sqrt[3]{2}+\sqrt[3]{-16}+\sqrt[3]{54}=5\sqrt[3]{2}-2\sqrt[3]{2}+3\sqrt[3]{2}=6\sqrt[3]{2}\)
\(5\sqrt[3]{2}+\sqrt[3]{-16}+\sqrt[3]{54}\)
\(=5\sqrt[3]{2}-2\sqrt[3]{2}+3\sqrt[3]{2}\)
\(=6\sqrt[3]{2}\)
Rút gọn biểu thức a 2 + 8 a + 16 + a 2 - 8 a + 16 với - 4 ≤ a ≤ 4 ta được
A. 2a
B. 8
C. -8
D. -2a
Rút gọn biểu thức
P= 12(5^2+1)(5^4+1)(5^8+1)(5^16+1)
\(P=12\left(5^2+1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)\)
\(=\dfrac{\left(5^4-1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)}{2}\)
\(=\dfrac{\left(5^8-1\right)\left(5^8+1\right)\left(5^{16}+1\right)}{2}\)
\(=\dfrac{\left(5^{16}-1\right)\left(5^{16}+1\right)}{2}\)
\(=\dfrac{5^{32}-1}{2}\)
\(P=12\left(5^2+1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)\)
\(2P=\left(5^2-1\right)\left(5^2+1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{32}+1\right)\)
\(2P\)\(=\left(5^4-1\right)\left(5^4+1\right)\left(5^8+1\right)\left(5^{16}+1\right)\left(5^{32}+1\right)\)
\(2P=\)\(\left(5^8-1\right)\left(5^8+1\right)\left(5^{16}+1\right)\left(5^{32}+1\right)\)
\(2P=\left(5^{16}-1\right)\left(5^{16}+1\right)\left(5^{32}+1\right)\)
\(2P=5^{32}-1\)
\(P=\dfrac{5^{32}-1}{2}\)