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Use a change of variables to evaluate the following definite integral. 7 dx 19x + 18x +9 . . . Determine a change of variables
Use a change of variables to evaluate the following definite integral. 7 dx 19x + 18x +9 . . . Determine a change of variables from x to u. Choose the correct answer below. O A. u= 9x + 18x +9 O B. u= 3x O C. u = 9x O D. U= 3x + 3 Write the integral in terms of u w 7 dx = du 19x + 18x + 9 6 Evaluate the integral. W 7 dx = 1 9x + 18x + 9 (Type an exact answer.)
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