Question and Answers Forum

AllQuestion and Answers: Page 114

Question Number 212213 Answers: 1 Comments: 0

Can some please explain is there any use of imaginary numbers in real life? I have heard that this number has been used in many different fields. Why use a number which is not real.

$$\mathrm{Can}\:\mathrm{some}\:\mathrm{please}\:\mathrm{explain}\:\mathrm{is}\:\mathrm{there}\:\mathrm{any}\:\mathrm{use}\:\mathrm{of}\:\mathrm{imaginary}\:\mathrm{numbers}\:\mathrm{in}\:\mathrm{real}\:\mathrm{life}? \\ $$$$\mathrm{I}\:\mathrm{have}\:\mathrm{heard}\:\mathrm{that}\:\mathrm{this}\:\mathrm{number}\:\mathrm{has}\:\mathrm{been}\:\mathrm{used}\:\mathrm{in}\:\mathrm{many}\:\mathrm{different}\:\mathrm{fields}.\: \\ $$$$\mathrm{Why}\:\mathrm{use}\:\mathrm{a}\:\mathrm{number}\:\mathrm{which}\:\mathrm{is}\:\mathrm{not}\:\mathrm{real}. \\ $$$$ \\ $$$$ \\ $$$$ \\ $$

Question Number 212209 Answers: 1 Comments: 0

$$\:\: \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$$$ \\ $$

Question Number 212204 Answers: 0 Comments: 2

f(x) is continous and lim_(x→∞) f(x)=−∞ prove max(f(x)) exist

$${f}\left({x}\right)\:{is}\:{continous}\:{and} \\ $$$$\underset{{x}\rightarrow\infty} {\mathrm{lim}}{f}\left({x}\right)=−\infty \\ $$$${prove}\:{max}\left({f}\left({x}\right)\right)\:{exist} \\ $$

Question Number 212201 Answers: 1 Comments: 0

find the last two digits of 9^9^9 ?

$$\:\:\:\:\:\:\:\mathrm{find}\:\mathrm{the}\:\mathrm{last}\:\mathrm{two}\:\mathrm{digits}\:\mathrm{of}\:\mathrm{9}^{\mathrm{9}^{\mathrm{9}} } \:? \\ $$

Question Number 212226 Answers: 0 Comments: 1

Factorize: x^(16) −x^(14) +x^9 +x^7 +x

$$\:{Factorize}: \\ $$$$\:{x}^{\mathrm{16}} −{x}^{\mathrm{14}} +{x}^{\mathrm{9}} +{x}^{\mathrm{7}} +{x} \\ $$

Question Number 212186 Answers: 1 Comments: 0

sin^2 1^o + sin^2 5^o + sin^2 9^o + ... sin^2 89^o = a (1/b) b = ? Help me, please

$$ \\ $$$$\:\:\:{sin}^{\mathrm{2}} \:\mathrm{1}^{{o}} \:+\:{sin}^{\mathrm{2}} \:\mathrm{5}^{{o}} \:+\:{sin}^{\mathrm{2}} \:\mathrm{9}^{{o}} \:+\:...\:{sin}^{\mathrm{2}} \:\mathrm{89}^{{o}} \:=\:{a}\:\frac{\mathrm{1}}{{b}} \\ $$$$\:\:\:{b}\:=\:? \\ $$$$\:\:\:\mathbb{H}{elp}\:{me},\:{please} \\ $$$$ \\ $$

Question Number 212181 Answers: 2 Comments: 0

Question Number 212179 Answers: 2 Comments: 0

Question Number 212176 Answers: 0 Comments: 0

Question Number 212175 Answers: 1 Comments: 0

Question Number 212177 Answers: 2 Comments: 0

f(x)=arctan(((1−x)/(1+x)))=? ask:f^(2023) (0)

$$\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:\:{f}\left({x}\right)=\mathrm{arctan}\left(\frac{\mathrm{1}−{x}}{\mathrm{1}+{x}}\right)=? \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{ask}:{f}^{\mathrm{2023}} \left(\mathrm{0}\right) \\ $$

Question Number 212171 Answers: 0 Comments: 0

Question Number 212170 Answers: 2 Comments: 4

Question Number 212169 Answers: 1 Comments: 0

lim_(λ→0^+ ) ∫_λ ^(2λ) (e^((x−1)^2 ) /x)dx = ?

$$\:\:\:\:\:\:\:\:\:\:\underset{\lambda\rightarrow\mathrm{0}^{+} } {\mathrm{lim}}\:\:\int_{\lambda} ^{\mathrm{2}\lambda} \:\frac{{e}^{\left({x}−\mathrm{1}\right)^{\mathrm{2}} } }{{x}}{dx}\:=\:? \\ $$

Question Number 212164 Answers: 1 Comments: 0

Σ_(n=0) ^∞ (( (−1)^n )/(3n+1)) − ln((2)^(1/3) ) = ?

$$ \\ $$$$ \\ $$$$\:\:\:\:\:\:\:\underset{{n}=\mathrm{0}} {\overset{\infty} {\sum}}\frac{\:\left(−\mathrm{1}\right)^{{n}} }{\mathrm{3}{n}+\mathrm{1}}\:−\:\mathrm{ln}\left(\sqrt[{\mathrm{3}}]{\mathrm{2}}\:\right)\:=\:? \\ $$$$\: \\ $$$$ \\ $$

Question Number 212159 Answers: 1 Comments: 0

Question Number 212160 Answers: 1 Comments: 0

Question Number 212152 Answers: 2 Comments: 0

Question Number 212168 Answers: 0 Comments: 0

Question Number 212146 Answers: 2 Comments: 0

Find maximum without derivative x(6−x)(x−3)^2 (3<x<6)

$$\mathrm{Find}\:\mathrm{maximum}\:\mathrm{without}\:\mathrm{derivative} \\ $$$${x}\left(\mathrm{6}−{x}\right)\left({x}−\mathrm{3}\right)^{\mathrm{2}} \:\left(\mathrm{3}<{x}<\mathrm{6}\right) \\ $$

Question Number 212141 Answers: 2 Comments: 0

∫((cos^2 x)/(sin x+cos x))dx.

$$ \\ $$$$\:\:\:\:\:\:\:\:\int\frac{\mathrm{cos}^{\mathrm{2}} {x}}{\mathrm{sin}\:{x}+\mathrm{cos}\:{x}}{dx}. \\ $$$$ \\ $$

Question Number 212140 Answers: 1 Comments: 0

If, f(x)=− x^2 +4x −3 , g(x)= { (( (√(7−x)) 0≤x <7)),(( ⌊ 5x ⌋ −5x x≥7)) :} ⇒ R_(fog) = (a ,b] find the value of b−a R_(fog) = { (fog)(x)∣ x∈ D_(fog) }

$$ \\ $$$$\:\mathrm{I}{f},\:\:\:\:\:{f}\left({x}\right)=−\:{x}^{\mathrm{2}} \:+\mathrm{4}{x}\:−\mathrm{3}\: \\ $$$$\:\:\:\:\: \\ $$$$,\:{g}\left({x}\right)=\:\begin{cases}{\:\sqrt{\mathrm{7}−{x}}\:\:\:\:\:\:\:\:\:\:\:\:\:\mathrm{0}\leqslant{x}\:<\mathrm{7}}\\{\:\:\lfloor\:\mathrm{5}{x}\:\rfloor\:−\mathrm{5}{x}\:\:\:\:\:\:\:\:{x}\geqslant\mathrm{7}}\end{cases}\:\:\: \\ $$$$\:\:\:\:\:\: \\ $$$$\:\:\:\:\:\:\:\:\:\:\Rightarrow\:\:\:\:\:\:{R}_{{fog}} \:=\:\left({a}\:,{b}\right]\:\: \\ $$$$\:\:\:\:\:\:\:{find}\:\:{the}\:{value}\:{of}\:\:\:{b}−{a} \\ $$$$\:\:\:\:\:\:{R}_{{fog}} \:=\:\left\{\:\left({fog}\right)\left({x}\right)\mid\:{x}\in\:{D}_{{fog}} \:\right\} \\ $$

Question Number 212139 Answers: 1 Comments: 0

I_n = ∫_(−π) ^( π) (( sin(nx ))/((1 + e^x )sinx)) dx =?

$$ \\ $$$$ \\ $$$$\:\:\:\:\:\:\:\:\: \\ $$$$\:\:\:\:\:\:\:\mathrm{I}_{{n}} \:=\:\int_{−\pi} ^{\:\pi} \frac{\:\mathrm{sin}\left({nx}\:\right)}{\left(\mathrm{1}\:+\:{e}^{{x}} \right)\mathrm{sin}{x}}\:{dx}\:=?\:\:\:\:\:\:\: \\ $$$$\:\:\:\:\:\:\:\: \\ $$

Question Number 212137 Answers: 1 Comments: 0

lim_(n→∞) ((n)^(1/n) −1)(√n)=?

$$ \\ $$$$\:\:\:\:\:\:\:\:\:\:\:\underset{{n}\rightarrow\infty} {\mathrm{lim}}\left(\sqrt[{{n}}]{{n}}−\mathrm{1}\right)\sqrt{{n}}=? \\ $$$$ \\ $$

Question Number 212136 Answers: 0 Comments: 0

what is the maximal number of consecutive natural numbers which are coprime with the sum of their divisors

$${what}\:{is}\:{the}\:{maximal}\:{number}\:{of}\:{consecutive}\:{natural} \\ $$$${numbers}\:{which}\:{are}\:{coprime}\:{with}\:{the} \\ $$$${sum}\:{of}\:{their}\:{divisors} \\ $$

Question Number 212131 Answers: 0 Comments: 0

Pg 109 Pg 110 Pg 111 Pg 112 Pg 113 Pg 114 Pg 115 Pg 116 Pg 117 Pg 118

Contact: info@tinkutara.com