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Find a basis of the subspace of R4 that consists of all vectors perpendicular to both [1,0,0,7] and [0,1,-9,5]. Please show work!? Solve the equation 2cos(x+7pi/4)= square root of 3 ,which lie in [0,2pi) .find smallest and largest solution. Please show details ! Thanks? Could someone please help me find the LCD of this rational expression as well as the solution? 4/(x+1)+1/x=15/(2x)? For what integer value of x is 2x-9<5 and x-1>4? Can anybody tell me what's the Chaos Theory math equation?