MATH 221 Midterm: MATH 221 KSU Test 1s99

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The point value of each problem is given in the margin. problem. Find the derivatives of the following functions. (do not simplify your answers. ) (a) y = esin2 x (b) y = ln . 3vuut x + 1 x2 + 2 (c) y = x(ex) (24) 2. Evaluate the following integrals. (a) z x dx. 4x2 + 1 page 2 (b) z dx. Remark: i know, you don"t have a calculator. So, your answers will have to be expressed using the ln of various numbers. (18) 4. Evaluate the following limits. (a) lim x 0 x + 1 cos x page 4 (b) lim x 0 e2x. 1 e3x + 1 (c) limx (2x + 3)1/x (12) 5. Find the length of the curve y = cosh x , from x = 0 to x = 1 . [hint: at one point in the problem it will be useful to know the identity: cosh2 x sinh2 x = 1 ].

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