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Evaluate 
int_(0)^(6)(7e^(0.5 x)-5)dx and express the answer in simplest form.
Answer:

Evaluate 06(7e0.5x5)dx \int_{0}^{6}\left(7 e^{0.5 x}-5\right) d x and express the answer in simplest form.\newlineAnswer:

Full solution

Q. Evaluate 06(7e0.5x5)dx \int_{0}^{6}\left(7 e^{0.5 x}-5\right) d x and express the answer in simplest form.\newlineAnswer:
  1. Identify integral: Identify the integral to be solved.\newlineWe need to evaluate the integral of the function 7e0.5x57e^{0.5x} - 5 from 00 to 66. This can be written as:\newline06(7e0.5x5)dx.\int_{0}^{6}(7e^{0.5x} - 5)\,dx.
  2. Break into two: Break the integral into two separate integrals.\newlineThe integral of a sum is the sum of the integrals, so we can write:\newline(7e0.5x5)dx=7e0.5xdx5dx\int(7e^{0.5x} - 5)\,dx = \int 7e^{0.5x}\,dx - \int 5\,dx from 00 to 66.
  3. Evaluate first integral: Evaluate the first integral 067e(0.5x)dx\int_{0}^{6} 7e^{(0.5x)}dx. The antiderivative of e(0.5x)e^{(0.5x)} is (2e(0.5x))(2e^{(0.5x)}), because when we differentiate (2e(0.5x))(2e^{(0.5x)}), we get e(0.5x)e^{(0.5x)} times the derivative of (0.5x)(0.5x) which is 0.50.5, and 2×0.5=12 \times 0.5 = 1, giving us back e(0.5x)e^{(0.5x)}. Therefore, the antiderivative of 7e(0.5x)7e^{(0.5x)} is e(0.5x)e^{(0.5x)}00.
  4. Evaluate second integral: Evaluate the second integral 065dx\int_{0}^{6} 5\,dx. The antiderivative of a constant 55 is 5x5x. So the integral of 55 from 00 to 66 is 5x5x evaluated from 00 to 66.
  5. Combine and evaluate: Combine the antiderivatives and evaluate from 00 to 66. We have the antiderivatives 14e(0.5x)14e^{(0.5x)} and 5x5x. Now we need to evaluate these from 00 to 66: (14e(0.5x)5x)(14e^{(0.5x)} - 5x) | from 00 to 66 = (14e(0.56)56)(14e(0.50)50)(14e^{(0.5\cdot6)} - 5\cdot6) - (14e^{(0.5\cdot0)} - 5\cdot0).
  6. Perform final evaluation: Perform the evaluation using the bounds 00 and 66. First, we evaluate at the upper bound x=6x = 6: 14e(0.5×6)5×6=14e33014e^{(0.5\times6)} - 5\times6 = 14e^3 - 30. Next, we evaluate at the lower bound x=0x = 0: 14e(0.5×0)5×0=14e00=14×10=1414e^{(0.5\times0)} - 5\times0 = 14e^0 - 0 = 14\times1 - 0 = 14. Now, subtract the lower bound evaluation from the upper bound evaluation: (14e330)(14)=14e33014=14e344(14e^3 - 30) - (14) = 14e^3 - 30 - 14 = 14e^3 - 44.

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