(-4)x3x(-125)x25x(-8)
a/(-4) x(-3)x(-125)x25x(-8)
b/ (-4)x9x(-125)x25x(-8)
c/ 7x(-25)x(-3)x2x(-4)
d/ [93-(20-7)] : 16
e/ 53-(-51)+(-53)+49
f/ 168-49+(-68)+4
a) \(\left(-4\right)\left(-3\right)\left(-125\right).25.\left(-8\right)=\left[25\left(-4\right)\right]\left[\left(-125\right)\left(-8\right)\right]\left(-3\right)\)
\(=\left(-100\right).1000.\left(-3\right)=300.1000=300000\)
b) \(\left(-4\right).9\left(-125\right).25.\left(-8\right)=\left[25\left(-4\right)\right]\left[\left(-125\right)\left(-8\right)\right].9\)
\(=\left(-100\right).1000.9=\left(-100\right).9000=-900000\)
c) \(7.\left(-25\right)\left(-3\right).2.\left(-4\right)=\left[\left(-25\right)\left(-4\right)\left(-3\right)\right].7.2=-4200\)
d) \(\left[93-\left(20-7\right)\right]\div16=\left(93-13\right)\div16=80\div16=5\)
e) \(53-\left(-51\right)+\left(-53\right)+49=\left(53-53\right)+\left(51+49\right)=100\)
f) \(168-49+\left(-68\right)+4=168-49-68+4=55\)
b1
a) 29x(-13)-27x(-29)-14x(-29)
b) (-67)x(1-301)-301x67
c)(-4)x(-125)x25x(-8)x7
d) 1-2+3-4+5-6+.....+2013
b2
a) 11-(15+11)=x-(25-9)
b) 4x2^x-3=125
a)\(29.\left(-13\right)-27.\left(-29\right)-14.\left(-29\right)\)
\(=13\left(-29\right)-27.\left(-29\right)-14.\left(-29\right)\)
\(=-29.\left(13-27-14\right)\)
\(=\left(-28\right).\left(-29\right)\)
\(=812\)
giúp mik với mik đang cần gấp
b1 Tính hợp lý
a) 29x(-13)-27x(-29)-(-14)x(-29)
b) (-67)x(1-301)-301x67
c) (-4)x(-125)x25x(-8)x7
d) 1-2+3-4+5-6+....+2013
b2 Tìm x
a) 11-(15+11)=x-(25-9)
b) 4x2^x-3=125
Bài 1 d)
\(1-2+3-4+5-6+...+2013\)
\(=1+\left(-2+3\right)+\left(-4+5\right)+...+\left(-2012+2013\right)\)
\(=1+1+1+...+1\left(1006s\right)\)
\(=1006.1=1006\)
Tính giới hạn: l i m x → 0 2 x + 1 - 8 - x 3 x
A. 8
B. 13/12
C. 1/2
D. - ∞
Cho hàm số y = f x = 2 1 + x - 8 - x 3 x . Tính lim x → 0 f x
A. 1 12
B. 13 12
C. + ∞
D. 10 11
Đáp án B
Ta có lim x → 0 f x = 2 1 + x - 8 - x 3 x = lim x → 0 2 1 + x - 8 - x 3 x
lim x → 0 2 x 1 + x + 1 - x 4 + 2 8 - x 3 + 8 - x 2 3 x = lim x → 0 2 1 + x + 1 + 1 4 + 2 8 - x 3 + 8 - x 2 3 = 13 12 .
Cho hàm số y = f x = 2 1 + x − 8 − x 3 x . Tính lim x → 0 f x .
A. 1 12
B. 13 12
C. + ∞
D. 10 11
Cho hàm số y=f(x)= 2 1 + x - 8 - x 3 x . Tính lim x → 0 f ( x ) .
A. 1 12 .
B. 13 12 .
C. + ∞ .
D. 10 11 .
Cho hàm số y = f ( x ) = 2 1 + x - 8 - x 3 x . Tính lim x → 0 f ( x ) .
A. 1 12
B. 13 12
C. + ∞
D. 10 11
tính nhanh nếu có:(-18)x(50-22)x25x (62-32)