Question

Va rog urgent! Daca puteti sa ma ajutati la amandoua??

Answer 1

b) = 3^x• (3^2)^2= (3^3)^5

3^x = 3^15 : 3^4=

=> 3^x = 3^(15-4)

3^x= 3^11

X= 11

C)

5^x •(5^2)^3 : 5^3 = (5^4)^2

5^x • 5^6 : 5^3 = 5^8

5^x •5^(6-3)= 5^8

= 5^x •5^3 = 5^8

5^x = 5^8 : 5^3=

5^x = 5^(8-3)= 5^5

5^x = 5^5

X=5

Answer 2

b)

3ˣ x 9² = 27⁵

3ˣ x ( 3² ) ² = ( 3 ³ ) ⁵

3ˣ x 3⁴ = 3 ¹⁵

3 ˣ ⁺ ⁴ = 3¹⁵ = > x + 4 = 15 = > x = 15 - 4 = = > x = 11

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c)

5ˣ x 25 ³ : 125 = 625 ²

5ˣ x ( 5² ) ³ : 5³ =( 5⁴ ) ²

5ˣ x 5⁶ : 5³ = 5⁸

5 ⁽ ˣ ⁺ ⁶ ⁻ ³ ⁾ = 5⁸ == > x + 6 - 3 = 8 == > x = 8 + 3 - 6 == > x = 5