Question

 

 

 

 

Mn ơi giúp mình với 

Answer 1

\(a,x+2010=2021\\ \Rightarrow x=2021-2010\\ \Rightarrow x=11\\ b,x^5=32\\ \Rightarrow x^5=2^5\\ \Rightarrow x=2\\ c,2^x=16\\ \Rightarrow2^x=2^4\\ \Rightarrow x=4\\ d,4.2^x-3=125\\ \Rightarrow4.2^x=128\\ \Rightarrow2^x=32\\ \Rightarrow2^x=2^5\\ \Rightarrow x=5\\ e,3^x+3^{x+1}=324\\ \Rightarrow3^x+3^x.3=324\\ \Rightarrow\left(1+3\right).3^x=324\\ \Rightarrow4.3^x=324\\ \Rightarrow3^x=81\\ \Rightarrow3^x=3^4\\ \Rightarrow x=4\)

Answer 2

a, <=> x= 11

b, <=> x⁵ =2⁵

<=> x=2

c, <=> 2^x =2⁴

<=> x=4

d, 4.2^x -3 =125

<=> 4.2^x =128

<=> 2^x = 32

<=>2^x = 2⁵

<=> x=5

e, <=> 3^x +3^x.3=324

<=> 4.3^x =324

<=> 3^x =81

<=> 3^x =3⁴

<=> x=4