4° - Matemática

24/02/15

x²+y²=10

-1²+y²=10

1+y=10

Y=10-1

Y²=9

Y²=V9=±3

x²+2x+1=0

x²+2x+1=0

∆=b²-4ac

∆=2²-4.1.1

∆=4-4=0

                         -> -2=-1

                              2

x=-2±V0=-2±0

       2.1       2

                         -> -2=-1

                              2

       V={-1}

Log₅25=2

Log₆a=c <-> b^c=a

Log₃243=5

243 3

  81 3

  27 3

    9 3

    3 3

    1

Log₂₄₃3=x

243^x=3

(3⁵)^x=3¹

3^5x=3¹

5x=1

X=1

    5

Log₄64=x

4^x=64

4^x=4³

X=3

Log₆₄4=x

64^x=4

(4³)^x=4

3x=4¹

3x=1

X=1

    3

Log₆₄4+1 -> 1+1=5+3=8

             5      3  5   15   15

(9^x+1)^x+1=5