E=(217+172)x(915-315)x(24- 42) = ?
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đáp án bằng 0
Vì ta phân tích \(2^4\) bằng \(4^2\) nên khi ta trừ cho nhau =0
Mặt khác tất cả các số nhân với nhau bằng 0
a) (217 + 172).(915 – 315).(24 – 42)
= (217 + 172).(915 – 315).(16 - 16)
= 0
Vậy giá trị cần tìm là: 0
b) (82017 – 82015) : (82104.8)
= 82015.(82- 1) : 82015
= 64 – 1
= 63
Vậy giá trị cần tìm là: 63
a) (217+ 172).(915– 315).(24 – 42)
= (217 + 172).(915 – 315).(16 - 16)
= 0
Vậy giá trị cần tìm là: 0
b) (82017– 82015) : (82104.8)
= 82015.(82- 1) : 82015
= 64 – 1
= 63
Vậy giá trị cần tìm là: 63
\(\left(2^{17}+7^2\right).\left(9^{15}-3^{15}\right).\left(2^4-4^2\right)\)
\(=\left(2^{17}+7^2\right).\left(9^{15}-3^{15}\right).\left(16-16\right)\)
\(=\left(2^{17}+7^2\right).\left(9^{15}-3^{15}\right).0\)
\(=0\)
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\(\left(7^{1997}-7^{1995}\right):\left(7^{1994}.7\right)\)
\(=\left[7^{1995}\left(7^2-1\right)\right]:7^{1995}\)
\(=7^{1995}.48:7^{1995}\)
\(=48\)
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\(\left(1^2+2^3+3^4+4^5\right).\left(1^3+2^3+3^3+4^3\right).\left(3^8-81^2\right)\)
\(=\left(1^2+2^3+3^4+4^5\right).\left(1^3+2^3+3^3+4^3\right).\left(6561-6561\right)\)
\(=\left(1^2+2^3+3^4+4^5\right).\left(1^3+2^3+3^3+4^3\right).0\)
\(=0\)
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\(\left(2^8+8^3\right):\left(2^5.2^3\right)\)
\(=\left[2^8+\left(2^3\right)^3\right]:2^8\)
\(=\left(2^8+2^9\right):2^8\)
\(=2^8.\left(1+2\right):2^8\)
\(=2^8.3:2^8\)
\(=3\)
(2¹⁷ + 17²) . (9¹⁵ - 3¹⁵) . (2⁴ - 4²)
= (2¹⁷ + 17²) . (9¹⁵ - 3¹⁵) . (16 - 16)
= (2¹⁷ + 17²) . (9¹⁵ - 3¹⁵) . 0
= 0
\(a,A=\left(2^{17}+17^2\right)\left(9^{15}-3^{30}\right).\left(2^4-32^2\right)\)
\(\Rightarrow A=\left(2^{17}+17^2\right)\left(3^{30}-3^{30}\right).\left(2^4-32^2\right)\)
\(\Rightarrow A=\left(2^{17}+17^2\right).0.\left(2^4-32^2\right)\)
\(\Rightarrow A=0.\)
\(\Rightarrow B=\left(2^8.8^3\right):\left(2^5.2^3\right)\)
\(\Rightarrow B=\left(2^8.2^9\right):\left(2^5.2^3\right)\)
\(\Rightarrow B=2^{17}:2^8\)
\(\Rightarrow B=2^9\)
\(\Rightarrow B=512\)
\(c,C=64^4.16^5:4^{20}\)
\(\Rightarrow C=2^{24}.2^{20}:2^{40}\)
\(\Rightarrow C=2^4\)
\(\Rightarrow C=16\)
a: \(A=\left(2^{17}+17^2\right)\cdot\left(2^4-32^2\right)\cdot\left(3^{30}-3^{30}\right)=0\)
b: \(B=\dfrac{2^8\cdot2^9}{2^5\cdot2^3}=2^9\)
c: \(C=2^{24}\cdot2^{20}:2^{40}=2^4=16\)
\(124 - (118 - x) = 217\)
\(118-x=124-217\)
\(118-x=-93\)
\(x=118-\left(-93\right)\)
\(x=211\)
\(---\)
\(315+(146-x)=401\)
\(146-x=401-315\)
\(146-x=86\)
\(x=146-86\)
\(x=60\)
\(---\)
\(575-(6x+70)=445\)
\(6x+70=575-445\)
\(6x+70=130\)
\(6x=130-70\)
\(6x=60\)
\(x=60:6\)
\(x=10\)
\(---\)
\(315+(125-x)=435\)
\(125-x=435-315\)
\(125-x=120\)
\(x=125-120\)
\(x=5\)
#\(Toru\)
124 - ( 118 - x ) = 217
118 - x =124-217
118 - x =-93
x=118-(-93)
x= 211
315 + ( 146 - x ) = 401 \
146 - x=401-315
146 - x= 83
x= 146-83
x=63
575 - ( 6x + 70 ) = 445
6x + 70=575-445
6x + 70=130
6x=130-70
6x =60
x=60:6
x=10
315 + ( 125 - x ) = 435
125 - x=435-315
124-x=120
x=124-120
x=4
Ta có: \(\left(2^{17}+15^4\right)\cdot\left(3^{19}-2^{17}\right)\cdot\left(2^4-4^2\right)\)
\(=\left(2^{17}+15^4\right)\left(3^{19}-2^{17}\right)\cdot\left(16-16\right)\)
=0
E = ( 217 + 172 ) . ( 915 - 315 ) . ( 24 - 42 )
E = ( 217 + 172 ) . ( 915 - 315 ) . ( 16 - 16 )
E = ( 217 + 172 ) . ( 915 - 315 ) . 0
E = 0