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Question Number 35362 Answers: 1 Comments: 3

Question Number 35363 Answers: 3 Comments: 0

Q_1 . A quadratic equation x^2 −3x+4=0 has roots α and β .without solving a)write down the values of α^2 +β^2 b) find the quadratic equation with integral coefficients,whose roots are (1/α^2 ) and(1/β^2 ) Q_2 . the first term of a GP is 32 and the sum to infinity is 48. find the common ratio and the 8^(th) term of the progression

$${Q}_{\mathrm{1}} .\:{A}\:{quadratic}\:{equation}\:{x}^{\mathrm{2}} −\mathrm{3}{x}+\mathrm{4}=\mathrm{0} \\ $$$${has}\:{roots}\:\alpha\:{and}\:\beta\:.{without}\:{solving} \\ $$$$\left.{a}\right){write}\:{down}\:{the}\:{values}\:{of}\:\alpha^{\mathrm{2}} +\beta^{\mathrm{2}} \\ $$$$\left.{b}\right)\:{find}\:{the}\:{quadratic}\:{equation} \\ $$$${with}\:{integral}\:{coefficients},{whose} \\ $$$${roots}\:{are}\:\frac{\mathrm{1}}{\alpha^{\mathrm{2}} }\:{and}\frac{\mathrm{1}}{\beta^{\mathrm{2}} } \\ $$$${Q}_{\mathrm{2}} .\:{the}\:{first}\:{term}\:{of}\:{a}\:{GP}\:{is}\:\mathrm{32}\: \\ $$$${and}\:{the}\:{sum}\:{to}\:{infinity}\:{is}\:\mathrm{48}. \\ $$$${find}\:{the}\:{common}\:{ratio}\:{and}\:{the}\:\mathrm{8}^{{th}} \\ $$$${term}\:{of}\:{the}\:{progression} \\ $$

Question Number 35357 Answers: 2 Comments: 0

Q_1 . find the term in x^6 in the expansion of (x^2 +(2/x))^9 Q_2 . in the binomial expansion of (x+(k/x))^6 , the term independent of x is 160 find the value of k. Q_3 . find the constand term in the binomial of (x+(3/x))^(12) .

$${Q}_{\mathrm{1}} .\:{find}\:{the}\:{term}\:{in}\:{x}^{\mathrm{6}} \:{in}\:{the}\: \\ $$$${expansion}\:{of}\:\left({x}^{\mathrm{2}} +\frac{\mathrm{2}}{{x}}\right)^{\mathrm{9}} \\ $$$${Q}_{\mathrm{2}} .\:{in}\:{the}\:{binomial}\:{expansion}\:{of} \\ $$$$\:\left({x}+\frac{{k}}{{x}}\right)^{\mathrm{6}} ,\:{the}\:{term}\:{independent}\:{of}\:{x} \\ $$$${is}\:\mathrm{160}\:{find}\:{the}\:{value}\:{of}\:{k}. \\ $$$${Q}_{\mathrm{3}} .\:{find}\:{the}\:{constand}\:{term}\:{in}\:{the} \\ $$$${binomial}\:{of}\:\left({x}+\frac{\mathrm{3}}{{x}}\right)^{\mathrm{12}} . \\ $$

Question Number 35348 Answers: 0 Comments: 0

Question Number 35347 Answers: 3 Comments: 0

Question Number 35345 Answers: 0 Comments: 0

yes (√2)x^2

$${yes}\:\sqrt{\mathrm{2}}{x}^{\mathrm{2}} \\ $$

Question Number 35344 Answers: 0 Comments: 0

Question Number 35338 Answers: 0 Comments: 1

((14x^2 +16)/(21))−((2x^2 +8)/(8x^2 −11))=((2x^2 )/3)

$$\frac{\mathrm{14}{x}^{\mathrm{2}} +\mathrm{16}}{\mathrm{21}}−\frac{\mathrm{2}{x}^{\mathrm{2}} +\mathrm{8}}{\mathrm{8}{x}^{\mathrm{2}} −\mathrm{11}}=\frac{\mathrm{2}{x}^{\mathrm{2}} }{\mathrm{3}} \\ $$

Question Number 35336 Answers: 2 Comments: 1

(√(2x^2 ))+7x+5(√2)=0

$$\sqrt{\mathrm{2}{x}^{\mathrm{2}} }+\mathrm{7}{x}+\mathrm{5}\sqrt{\mathrm{2}}=\mathrm{0} \\ $$

Question Number 35325 Answers: 1 Comments: 0

Sketch the region enclosed by the curves of y=1/x and y=1/x^2 and find the area of the region. plzz help me

$${Sketch}\:{the}\:{region}\:{enclosed}\:{by}\:{the} \\ $$$${curves}\:{of}\:{y}=\mathrm{1}/{x}\:{and}\:{y}=\mathrm{1}/{x}^{\mathrm{2}} \:{and} \\ $$$${find}\:{the}\:{area}\:{of}\:{the}\:{region}. \\ $$$${plzz}\:{help}\:{me} \\ $$

Question Number 35419 Answers: 1 Comments: 0

Given that f(x)= x^3 −x^2 +ax+b and g(x)= 2x^3 −9x^2 −3ax + b have a common factor (x−1) where a and b are constands . Find the values of a and b hence find other factors of f(x)

$${Given}\:{that}\: \\ $$$${f}\left({x}\right)=\:{x}^{\mathrm{3}} −{x}^{\mathrm{2}} +{ax}+{b}\:{and}\: \\ $$$${g}\left({x}\right)=\:\mathrm{2}{x}^{\mathrm{3}} −\mathrm{9}{x}^{\mathrm{2}} −\mathrm{3}{ax}\:+\:{b}\:{have}\:{a} \\ $$$${common}\:{factor}\:\left({x}−\mathrm{1}\right)\:{where}\:{a}\:{and} \\ $$$${b}\:{are}\:{constands}\:.\:{Find}\:{the}\:{values} \\ $$$${of}\:{a}\:{and}\:{b}\:{hence}\:{find}\:{other}\:{factors} \\ $$$${of}\:{f}\left({x}\right) \\ $$

Question Number 35313 Answers: 0 Comments: 0

Question Number 35304 Answers: 2 Comments: 4

Q1. a) solve for x 9^x +5(3^x )=6 b)write down the first 4 terms in the binomial expansion of (1−3x)^7 c)the sum S_n of the first n^(th) terms is given by S_(n ) = 3(1−((2/3))^n ) find d) the common ratio e) the sum to infinity of the progression

$$\left.\:{Q}\mathrm{1}.\:\:\:{a}\right)\:{solve}\:{for}\:{x}\:\:\mathrm{9}^{{x}} +\mathrm{5}\left(\mathrm{3}^{{x}} \right)=\mathrm{6} \\ $$$$\left.{b}\right){write}\:{down}\:{the}\:{first}\:\:\mathrm{4}\:{terms} \\ $$$${in}\:{the}\:{binomial}\:{expansion}\:{of}\:\left(\mathrm{1}−\mathrm{3}{x}\right)^{\mathrm{7}} \\ $$$$\left.{c}\right){the}\:{sum}\:{S}_{{n}} \:{of}\:{the}\:{first}\:{n}^{{th}} {terms} \\ $$$${is}\:{given}\:{by}\:{S}_{{n}\:} =\:\mathrm{3}\left(\mathrm{1}−\left(\frac{\mathrm{2}}{\mathrm{3}}\right)^{{n}} \right)\:{find} \\ $$$$\left.{d}\right)\:{the}\:{common}\:{ratio} \\ $$$$\left.{e}\right)\:{the}\:{sum}\:{to}\:{infinity}\:{of}\:{the}\:{progression} \\ $$

Question Number 35300 Answers: 0 Comments: 0