\( \frac{1}{a}+\frac{1}{b}+\frac{1}{c}+\frac{1}{d}=\frac{1}{4} \) olduğuna göre, a nın alabileceği kaç farklı tam sayı değeri vardır? \( \begin{array}{lllll}\text { A) } 5 & \text { B) } 6 & \text { C) } 8 & \text { D) } 9 & \text { E) } 11\end{array} \)

*15. Write the equation in equivalent exponential form. \[ \log _{16} 4=\frac{1}{2} \] The equivalent exponential form is \( 16^{\frac{1}{2}}=4 \). (Type an equation. Use integers or fractions for any numbers in the equation.)

*16. Solve the equation to four decimal places. \( 2.387^{12 t}=4 \) \( t \approx 0.0131 \)

3. The solution of the equation \( \left|x^{2}+1\right|\left(x^{2}+x+1\right)=0 \) is ( )

Q.24) Simplify the expression: \( 2(a-b)^{2}+3\left(a^{2}-b^{2}\right)-\left(a^{2}-2 a b+b^{2}\right) \) and find its valu when \( a=-1 \) and \( b=2 \).

b) \( f(x)=2 x+9 \) olívornagöre fanksiyonve sifirid bulanuz.