Question

va rog dau coroana..
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Answer 1

e)

8^2x+1 + 8^2x = 9 × 2^2010

8^2x × 8^1 + 8^2x = 9 × 2^2010

8^2x ( 8^1 + 1) = 9 × 2^2010

8^2x × 9 = 9 × 2^2010 | : 9

(2^3)^2x = 2^2010

2^6x = 2^2010

6x = 2010

x = 2010 : 6

x = 335
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f)

5^x + 5^x+1 + 5^x+2 = 775

5^x + 5^x × 5^1 + 5^x × 5^2 = 775

5^x ( 1 + 5^1 + 5^2) = 775

5^x ( 1 + 5 + 25) = 775

5^x × 31 = 775

5^x = 775 : 31

5^x = 25

5^x = 5^2

x = 2
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^ = simbol folosit ptr ridicarea la putere

5^x = 5 la puterea x