Maxima and Minima
Application of Derivatives

85729 For real number \(x\), if the minimum value of \(f(x)\) \(=x^{2}+2 b x+2 c^{2}\) is greater than the maximum value of \(g(x)=-x^{2}-2 c x+b^{2}\), then

1 \(\mathrm{c}^{2}>2 \mathrm{~b}^{2}\)
2 \(\mathrm{c}^{2}\lt 2 \mathrm{~b}^{2}\)
3 \(\mathrm{b}^{2}=2 \mathrm{c}^{2}\)
4 \(\mathrm{c}^{2}=2 \mathrm{~b}^{2}\)
Application of Derivatives

85730 The sum of the maximum and the minimum values of \(3 x^{4}-2 x^{3}-6 x^{2}+6 x+4\), in \((0,2)\) is

1 28
2 \(\frac{167}{16}\)
3 \(\frac{134}{15}\)
4 \(\frac{87}{16}\)
Application of Derivatives

85731 If \(p\) and \(q\) are respectively the global maximum and global minimum of the function \(f(x)=x^{2} e^{2 x}\) on the interval \([-2,2]\),
then \(\mathrm{pe}^{-4}+\mathrm{qe}^{4}=\)

1 0
2 \(4 \mathrm{e}^{8}\)
3 4
4 \(4 \mathrm{e}^{8}+1\)
Application of Derivatives

85732 From a rectangular sheet having dimensions 30 \(\mathbf{c m} \times 80 \mathrm{~cm}\), four equal squares of side \(x \mathrm{~cm}\) are cut at each corner. The remaining sides of the rectangle are folded up vertically so as to form an open rectangular box. Find the value of ' \(x\) ' for which the volume of the box formed is maximum.

1 \(x=30 \mathrm{~cm}\)
2 \(x=20 \mathrm{~cm}\)
3 \(x=\frac{20}{3} \mathrm{~cm}\)
4 \(x=15 \mathrm{~cm}\)
Application of Derivatives

85729 For real number \(x\), if the minimum value of \(f(x)\) \(=x^{2}+2 b x+2 c^{2}\) is greater than the maximum value of \(g(x)=-x^{2}-2 c x+b^{2}\), then

1 \(\mathrm{c}^{2}>2 \mathrm{~b}^{2}\)
2 \(\mathrm{c}^{2}\lt 2 \mathrm{~b}^{2}\)
3 \(\mathrm{b}^{2}=2 \mathrm{c}^{2}\)
4 \(\mathrm{c}^{2}=2 \mathrm{~b}^{2}\)
Application of Derivatives

85730 The sum of the maximum and the minimum values of \(3 x^{4}-2 x^{3}-6 x^{2}+6 x+4\), in \((0,2)\) is

1 28
2 \(\frac{167}{16}\)
3 \(\frac{134}{15}\)
4 \(\frac{87}{16}\)
Application of Derivatives

85731 If \(p\) and \(q\) are respectively the global maximum and global minimum of the function \(f(x)=x^{2} e^{2 x}\) on the interval \([-2,2]\),
then \(\mathrm{pe}^{-4}+\mathrm{qe}^{4}=\)

1 0
2 \(4 \mathrm{e}^{8}\)
3 4
4 \(4 \mathrm{e}^{8}+1\)
Application of Derivatives

85732 From a rectangular sheet having dimensions 30 \(\mathbf{c m} \times 80 \mathrm{~cm}\), four equal squares of side \(x \mathrm{~cm}\) are cut at each corner. The remaining sides of the rectangle are folded up vertically so as to form an open rectangular box. Find the value of ' \(x\) ' for which the volume of the box formed is maximum.

1 \(x=30 \mathrm{~cm}\)
2 \(x=20 \mathrm{~cm}\)
3 \(x=\frac{20}{3} \mathrm{~cm}\)
4 \(x=15 \mathrm{~cm}\)
Application of Derivatives

85729 For real number \(x\), if the minimum value of \(f(x)\) \(=x^{2}+2 b x+2 c^{2}\) is greater than the maximum value of \(g(x)=-x^{2}-2 c x+b^{2}\), then

1 \(\mathrm{c}^{2}>2 \mathrm{~b}^{2}\)
2 \(\mathrm{c}^{2}\lt 2 \mathrm{~b}^{2}\)
3 \(\mathrm{b}^{2}=2 \mathrm{c}^{2}\)
4 \(\mathrm{c}^{2}=2 \mathrm{~b}^{2}\)
Application of Derivatives

85730 The sum of the maximum and the minimum values of \(3 x^{4}-2 x^{3}-6 x^{2}+6 x+4\), in \((0,2)\) is

1 28
2 \(\frac{167}{16}\)
3 \(\frac{134}{15}\)
4 \(\frac{87}{16}\)
Application of Derivatives

85731 If \(p\) and \(q\) are respectively the global maximum and global minimum of the function \(f(x)=x^{2} e^{2 x}\) on the interval \([-2,2]\),
then \(\mathrm{pe}^{-4}+\mathrm{qe}^{4}=\)

1 0
2 \(4 \mathrm{e}^{8}\)
3 4
4 \(4 \mathrm{e}^{8}+1\)
Application of Derivatives

85732 From a rectangular sheet having dimensions 30 \(\mathbf{c m} \times 80 \mathrm{~cm}\), four equal squares of side \(x \mathrm{~cm}\) are cut at each corner. The remaining sides of the rectangle are folded up vertically so as to form an open rectangular box. Find the value of ' \(x\) ' for which the volume of the box formed is maximum.

1 \(x=30 \mathrm{~cm}\)
2 \(x=20 \mathrm{~cm}\)
3 \(x=\frac{20}{3} \mathrm{~cm}\)
4 \(x=15 \mathrm{~cm}\)
Application of Derivatives

85729 For real number \(x\), if the minimum value of \(f(x)\) \(=x^{2}+2 b x+2 c^{2}\) is greater than the maximum value of \(g(x)=-x^{2}-2 c x+b^{2}\), then

1 \(\mathrm{c}^{2}>2 \mathrm{~b}^{2}\)
2 \(\mathrm{c}^{2}\lt 2 \mathrm{~b}^{2}\)
3 \(\mathrm{b}^{2}=2 \mathrm{c}^{2}\)
4 \(\mathrm{c}^{2}=2 \mathrm{~b}^{2}\)
Application of Derivatives

85730 The sum of the maximum and the minimum values of \(3 x^{4}-2 x^{3}-6 x^{2}+6 x+4\), in \((0,2)\) is

1 28
2 \(\frac{167}{16}\)
3 \(\frac{134}{15}\)
4 \(\frac{87}{16}\)
Application of Derivatives

85731 If \(p\) and \(q\) are respectively the global maximum and global minimum of the function \(f(x)=x^{2} e^{2 x}\) on the interval \([-2,2]\),
then \(\mathrm{pe}^{-4}+\mathrm{qe}^{4}=\)

1 0
2 \(4 \mathrm{e}^{8}\)
3 4
4 \(4 \mathrm{e}^{8}+1\)
Application of Derivatives

85732 From a rectangular sheet having dimensions 30 \(\mathbf{c m} \times 80 \mathrm{~cm}\), four equal squares of side \(x \mathrm{~cm}\) are cut at each corner. The remaining sides of the rectangle are folded up vertically so as to form an open rectangular box. Find the value of ' \(x\) ' for which the volume of the box formed is maximum.

1 \(x=30 \mathrm{~cm}\)
2 \(x=20 \mathrm{~cm}\)
3 \(x=\frac{20}{3} \mathrm{~cm}\)
4 \(x=15 \mathrm{~cm}\)