1. Perhatikan pernyataan di bawah ini! Definisi yang salah adalah a. \( 3 a=a+a+a \) b. \( a^{2}=a+a \) c. \( 2\left(\frac{1}{2} a\right)=\frac{1}{2} a+\frac{1}{2} a \) d. \( a^{3}=a \times a \times a \)

6. If the roots of the equation \( \left(a^{2}+b^{2}\right) x^{2}-2\left(a c+b d^{2}\right) x+\left(c^{2}+d^{2}\right)=0 \) are equal, then pro \( \frac{a}{b}=\frac{c}{d} \).

a) \( \frac{12 a b}{4 a}= \)

4. Find the value of \( k \) so that the equation \( k x^{2}+k x+1=-4 x^{2}-x \) have equal roots. 5. For what values of \( m \) will the equation \( x^{2}-2(5+2 m) x+3(7+10 m)=0 \) have equal roots? 6. If the roots of the equation \( \left(a^{2}+b^{2}\right) x^{2}-2(a c+b c) x+\left(c^{2}+c^{2}\right)=0 \) are cqual, then prove the \( a \) c \( c \)

5) Qual a expressão cujo desenvolvimento logarítmico é dado abaixo ( \( a, b \), c são reais positivos)? a) \( \log _{2} a+\log _{2} b-\log _{2} c \) b) \( \frac{1}{3} \log a-\frac{1}{2} \log c-\frac{3}{2} \log b \) c) \( 2+\frac{1}{3} \log _{2} a+\frac{1}{6} \log _{2} b-\log _{2} c \) d) \( \frac{1}{2} \log (a-b)+\log a-\log (a+b) \)

Find two consecuthe even integers whase Sum is 54 .