the line y=3x+k is tangent to the curve x^2+xy+16=0 find possible values of k

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• the line y=3x+k is tangent to the curve x^2+xy+16=0 find possible values of k
• Find the equations of the tangent line and the normal line to the curve at the given point.6x^2+3xy+2y^2+17y-6=0,(-1,0)
• the line y=3x+k is tangent to the curve x^2+xy+16=0 find possible values of k
• The point P(7,-4)lies on the curve y=4/(6-x)(a) If Q is the point(x,4/6-x),use your calculator to find the slopemPQ of the secant line PQ (correct to six decimal places) for the following values of x.(1) 6.9 mPQ=?(2) 6.99 mPQ=?(3) 6.999 mPQ=?(4) 6.9999 mPQ=?(5) 7.1 mPQ=?(6) 7.01 mPQ=?(7) 7.001 mPQ=?(8) 7.0001 mPQ=?(b) Using the results of part (a),guess the value of the slope m of the tangent line to the curve at P(7,-4),m=?(c) Using the slope from pa
• Find an equation of the tangent line to the curve at the given point.y = sin 7x + sin2 7x,(0,0)
• 英语翻译A:your prince for Frozen Rabbit Meat is too low to accept.B:What's the reason?A:As you may have seen from our samples,we have improved our packing methods,which cost us a lot.B:Then what's the gap between our princes?A:At least US$2 per kilogramB:If so,I will have to make a long-distance call to our head officeA:It's better for you to amend your price without delay and give us a reply within 5 days.B:I'll inform you as soon as I hear from homeA:We
• lg(sinx)=lg(cosx),则x=