1. Use the definition (e-6) of the limit to show that lim f(r. y) does not exist for (z,y)-(0,0) f(x,y) = xy |ry| 2. Consider a triangle with sides a, b, c and let be the angle opposite the side c. Regarding e as a function of a, b, and 0, determine the differential de and use the result to approximate c when a = 6.20, b= 5.90, and 0 = 58°. (Use radian measure for 9.)

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A: Note: As per our Guidelines we can solve first three subparts . please repost remaining parts.

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