Q. Calculate the integral and write the answer in simplest form.∫(3+x)dxAnswer:
Split Function: We need to find the indefinite integral of the function (3+x) with respect to x. The integral of a sum is the sum of the integrals, so we can integrate 3 and x separately.∫(3+x)dx=∫3dx+∫xdx
Integrate Constant: First, we integrate the constant 3 with respect to x. The integral of a constant a with respect to x is ax, so:∫3dx=3x
Integrate Variable: Next, we integrate x with respect to x. The integral of x with respect to x is (1/2)x2, because the power rule for integration states that ∫xndx=(n+1)x(n+1) for n=−1.∫xdx=(1/2)x2
Combine Results: Now, we combine the results of the two integrals and add the constant of integration C, since this is an indefinite integral.∫(3+x)dx=3x+21x2+C
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