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7. The series I 9"2 dx does not have a closed form (i.e. you can't find an antiderivative). So definite integrals must be approximated. But there are multiple ways to approximate the integrals. Method 1 Approximate the integral I: 9"2 dx using the trapezoidal rule with n = Z. a. Is your estimate an over-estimate or under-estimate and how do you know? Method 2 Write out the first four terms of the infinite series of 6"2 using the series of a known function, a list is at the end of the exam. b. Now use that polynomial to approximate f: 3'\"2 dx