Question

1000 : [30+(2^x-6)=3²+4²,x thuoc N

Answer 1

1000 : [30 + (2^x - 6)] = 3² + 4²

= 1000 : [ 30 + (2^x-6)] = 9 + 16 = 25

= 30 + (2^x - 6) = 1000 : 25 = 40

= 2^x - 6 = 40 - 30 = 10

2^x = 10 + 6 = 16

⇒ 2^x = 2⁴

⇒ x = 4

Answer 2

\(\Leftrightarrow2^x+24=40\)

hay x=4

Answer 3

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