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Question Number 155857 by zainaltanjung last updated on 05/Oct/21
1).Finddydx,if:a).y=(8x−1)(x2+4x+7)b).y=(3x4−10x+8)(2x2+5)2).Findanequationofthetangenlinetothegraphofy=51+x2ateachpointa).P(0,5)b).Q(1,52)3).Findthecoordinatofallpointonthegraphof:y=x3+2x2−4x+5atwhichthetangenlineis:a).horizontal.b).paraleltotheliney=2y+8x−5=04).FindpointPonthegraphofy=x3suchthatthetangenlineatPhasx−intercept45).Findthepointsatwhichthegraphf(x)andf′(x)isintersect,giventhata).f(x)=x3−x2+x+1b).f(x)=x2+2x+1
Answered by MathsFan last updated on 05/Oct/21
Q1.y=(8x−1)(x2+4x+7)y′=(8x−1)(2x+4)+(x2+4x+7)(8)y′=24x2+62x+52Q2y=(3x4−10x+8)(2x2+5)y′=(3x4−10x+8)(4x)+(2x2+5)(12x3−10)y′=12x5−40x2+32x+24x5−20x2+60x3−50y′=36x5+60x3−60x2+32x−50
Commented by zainaltanjung last updated on 05/Oct/21
thankssir
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