Question

1/ Cho A= { x c N* / x be hoac bang 6 } . viet tap hop A duoi dang dac trung

2/ tim x c N, biet:

a/ ( x + 15 ) . 3² = 45 . 100⁰

b/ 10 + 2x = 20 . 1¹⁰⁰

 

Answer 1

\(\)1)A={xEN*/x\(\ge\)6}

2) a)\(\Rightarrow\left(x+15\right).9=45\)

   \(\Rightarrow x+15=45:9=5\)

   \(\Rightarrow x=5-15\)

   \(\Rightarrow x=-10\)

b) \(\Rightarrow10+2x=20\)

   \(\Rightarrow2x=20-10=10\)

   \(\Rightarrow x=10:2=5\)

tíc mình nha

Answer 2

bai 1a ban viet duoi dang liet ke nha ! cam on nhieu!