Thu gọn
Mẫu : $7^{3}$ . $7^{5}$ = $7^{3+5}$ = $7^{8}$
1. $2^{3}$ . 2
2. (-$2)^{5}$ . (-$2)^{6}$
3. (-$0,2)^{4}$ . (-$0,2)^{5}$
4. ($\frac{3}{2}$)³ ($\frac{3}{2}$)²
5. (-$\frac{1}{2}$) (-$\frac{1}{2}$³)
6. ($\frac{-7}{8}$)² ( $\frac{-7}{8}$)³
7. (-2)³ . 2²
8. ($-5)^{7}$ . $5^{4}$
9. ($\frac{2}{3}$)$^{5}$ ($\frac{-2}{3}$)$^{4}$
10. x . x
11. ($-x)^{3}$ . ($-x)^{6}$
12. (-x) . $x^{2}$
13. ( $-x)^{10}$ . $x^{3}$
Giúp mình với tí nữa đi học rồi
1) 2^3 x2 = 2^ 3+1 = 2^4
2) (-2)^5 x(-2)^6= (-2)^ 5+6=(-2) ^11
3) (-0.2)^4 x (-0.2)^5 = (-0.2)^4+5=(-0.2)^9
4) (3/2)^3 x (3/2) ^2= (3/2)^3+2= (3/2)^5
5) (-1/2) x (-1/2)^3= (-1/2) ^ 1+3 = (-1/2) ^4
6) (-7/8)^2 x ( -7/8 )^3 = (-7/8)^2+3=(-7/8)^5
8) (-5)^7 x5^4 = (-1) x ( -5) ^7+4=(-1) x 5^11 = (-5)^11
7) (-2)^3 x 2^2=(-1) x 2^3+2= (-2)^5)
9) (2/3)^5 x (2/3)^4 = (-1) x (2/3)^5+4 = (-2/3)^9
10) x . x= x^1. x^1= x^1+1=x²
11) (-x)³ .(-x)^6= (-x) ^ 3+6=(-x)^9
12) (-x) . x² = (-1) . (x)^1+2=(-x)^3
13) (-x)^10 . x³ = (-1) . x^10+3 =(-x)^13
cho mình xin trả lời hay nhất với
Đáp án:
$1/ 2³ . 2 = 2³ . 2^{1} = 2^{3+1} = 2^{4}$
$2/ (-2)^{5} . (-2)^{6} = (-2)^{5+6} = (-2)^{11}$
$3/ (-0,2)^{4} . (-0,2)^{5} = (-0,2)^{4+5} = (-0,2)^{9}$
$4/ (\frac{3}{2})^{3} . (\frac{3}{2})^{2} = (\frac{3}{2})^{3+2} = (\frac{3}{2})^{5}$
$5/ (-\frac{1}{2})$ . $(-\frac{1}{2})^{3} = (-\frac{1}{2})^{1} . (-\frac{1}{2})^{3} = (-\frac{1}{2})^{1+3} = (-\frac{1}{2})^{4}$
$6/ (\frac{-7}{8})^{2} . (\frac{-7}{8})^{3} = (\frac{-7}{8})^{2+3} = (\frac{-7}{8})^{5}$
$7/ (-2)^{3} . 2^{2} = (-2)^{3} . (-2)^{2} = (-2)^{3+2} = (-2)^{5}$
$8/ (-5)^{7} . 5^{4} = (-5)^{7} . (-5)^{4} = (-5)^{7+4} = (-5)^{11}$
$9/ (\frac{2}{3})^{5} . (\frac{-2}{3})^{4} = (\frac{2}{3})^{5} . (\frac{2}{3})^{4} = (\frac{2}{3})^{5+4} = (\frac{2}{3})^{9}$
$10/ x . x = x^{1} . x^{1} = x^{1+1} = x^{2}$
$11/ (-x)^{3} . (-x)^{6} = (-x)^{3+6} = (-x)^{9}$
$12/ (-x) . x^{2} = (-x)^{1} . (-x)^{2} = (-x)^{1+2} = (-x)^{3}$
$13/ (-x)^{10} . x^{3} = x^{10} . x^{3} = x^{10+3} = x^{13}$
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