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Mathematics

KG - Professional Development

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10 questions

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1.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 ddxx+1x1\frac{d}{dx}\frac{\sqrt{x+1}}{\sqrt{x-1}}  

 x12(x1)x+1x+12x2\frac{\sqrt{x-1}}{2\left(x-1\right)\sqrt{x+1}}-\frac{\sqrt{x+1}}{2x-2}  

 12xx+1\frac{1}{2x-\sqrt{x+1}}  

 x2(x1)x+1x+1x12x\frac{\sqrt{x}}{2\left(x-1\right)\sqrt{x+1}}-\frac{\sqrt{x+1}\sqrt{x-1}}{2x}  

 12(x1)x+1x+1\frac{1}{2\left(x-1\right)\sqrt{x+1}}-\sqrt{x+1}  

2.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 (t2+3t1)dt\int_{ }^{ }\left(t^2+3^t-1\right)dt  

 t33+3tln3t +C\frac{t^3}{3}+\frac{3^t}{\ln3}-t\ +C  

 t25+2t3+t +C\frac{t^2}{5}+\frac{2^t}{3}+t\ +C  

 t32+t3+C\frac{t^3}{2}+\frac{t}{3}+C  

 t3+ln2ln3+Ct^3+\frac{\ln2}{\ln3}+C  

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 ddxsinπxtanπx\frac{d}{dx}\sin\pi x-\tan\pi x  

 π(cosπx  1cos2πx)\pi\left(\cos\pi x\ -\ \frac{1}{\cos^2\pi x}\right)  

 cosx  πcos2πx\cos x\ -\ \frac{\pi}{\cos^2\pi x}  

 cosπx  πcos2x\cos\pi x\ -\ \frac{\pi}{\cos^2x}  

 π(cosx  1cos2πx)\pi\left(\cos x\ -\ \frac{1}{\cos^2\pi x}\right)  

4.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 2x=i2^x=i  

 iπln4\frac{i\pi}{\ln4}  

 πln2\frac{\pi}{\ln2}  

 ln4π +ln2\frac{\ln4}{\pi\ +\ln2}  

 iπln2i\pi\ln2  

5.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 n=1(1)nn!\sum_{n=1}^{\infty}\frac{\left(-1\right)^n}{n!}  

 1e\frac{1}{e}  

 e2e^{-2}  

 e1ee^{\frac{1}{e}}  

 e+1ee+\frac{1}{e}  

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

 ab=a+b (Resuelve para a   Solve for a)ab=a+b\ \left(Resuelve\ para\ a\ \ -\ Solve\ for\ a\right)  

 a=bb1a=\frac{b}{b-1}  

 a=b21ba=b^2-\frac{1}{b}  

 a=b2+b2a=\frac{b^2+b}{2}  

 a=b+1ba=\frac{b+1}{b}  

7.

MULTIPLE CHOICE QUESTION

3 mins • 1 pt

 ddxsin(x2)+cos(x2)\frac{d}{dx}\sin\left(x^2\right)+\cos\left(x^2\right)  

 2x(cos(x2)sin(x2))2x\left(\cos\left(x^2\right)-\sin\left(x^2\right)\right)  

 2cos(x)+2sin(x2)2\cos\left(x\right)+2\sin\left(x^2\right)  

 cos(x2)3sin(x2)\cos\left(x^2\right)-3\sin\left(x^2\right)  

 2cos(x)2sin(x)2\cos\left(x\right)-2\sin\left(x\right)  

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