Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Evaluate 
int_(0)^(8)(8e^(-0.25 x)-6)dx and express the answer in simplest form.
Answer:

Evaluate 08(8e0.25x6)dx \int_{0}^{8}\left(8 e^{-0.25 x}-6\right) d x and express the answer in simplest form.\newlineAnswer:

Full solution

Q. Evaluate 08(8e0.25x6)dx \int_{0}^{8}\left(8 e^{-0.25 x}-6\right) d x and express the answer in simplest form.\newlineAnswer:
  1. Identify Integral: Identify the integral to be evaluated.\newlineWe need to evaluate the integral of the function 8e0.25x68e^{-0.25x} - 6 with respect to xx from 00 to 88.
  2. Break Down Integral: Break down the integral into two separate integrals.\newlineThe integral of a sum of functions is the sum of the integrals of each function. Therefore, we can write:\newline(8e0.25x6)dx=8e0.25xdx6dx\int(8e^{-0.25x} - 6)\,dx = \int 8e^{-0.25x}\,dx - \int 6\,dx
  3. Evaluate First Integral: Evaluate the first integral 8e(0.25x)dx\int 8e^{(-0.25x)}dx. To integrate 8e(0.25x)8e^{(-0.25x)}, we use the substitution method. Let u=0.25xu = -0.25x, then du=0.25dxdu = -0.25dx, or dx=4dudx = -4du. The limits of integration also change with the substitution. When x=0x = 0, u=0u = 0, and when x=8x = 8, u=2u = -2. The integral becomes 32eudu-32\int e^u du from u=0u = 0 to u=2u = -2.
  4. Evaluate Second Integral: Evaluate the second integral 6dx\int 6\,dx. The integral of a constant is the constant times the variable of integration. Therefore, 6dx=6x\int 6\,dx = 6x. We evaluate this from 00 to 88, which gives us 6(8)6(0)=486(8) - 6(0) = 48.
  5. Evaluate 32eudu-32\int e^u du: Evaluate the integral 32eudu-32\int e^u du from u=0u = 0 to u=2u = -2. The integral of eue^u with respect to uu is eue^u. Therefore, 32eudu=32(eu)-32\int e^u du = -32(e^u). We evaluate this from u=0u = 0 to u=2u = -2, which gives us 32eudu-32\int e^u du00.
  6. Combine Results: Combine the results from Step 44 and Step 55.\newlineWe have 32(e21)+48-32(e^{-2} - 1) + 48.\newlineNow we need to calculate e2e^{-2} and simplify the expression.\newlinee2e^{-2} is approximately 0.13530.1353.\newlineSo, 32(0.13531)+48=32(0.8647)+48=27.6704+48=75.6704-32(0.1353 - 1) + 48 = -32(-0.8647) + 48 = 27.6704 + 48 = 75.6704.
  7. Express Answer: Express the answer in simplest form.\newlineThe simplest form of the answer is a decimal rounded to an appropriate number of significant figures. Since we have already calculated the numerical value, the answer is 75.670475.6704.

More problems from Evaluate rational expressions II