Integral Powers
1. **Problem statement:** Find the integral $$\int \frac{1}{(7x+4)^m} \, dx$$ for the cases (a) $$m=2$$ and (b) $$m=1$$.
2. **Formula and rules:** For integrals of the form $$\int (ax+b)^n \, dx$$ where $$n \neq -1$$, the formula is:
$$\int (ax+b)^n \, dx = \frac{(ax+b)^{n+1}}{a(n+1)} + C$$
For $$n = -1$$, the integral is:
$$\int \frac{1}{ax+b} \, dx = \frac{1}{a} \ln|ax+b| + C$$
3. **Case (a):** $$m=2$$, so the integral becomes:
$$\int \frac{1}{(7x+4)^2} \, dx = \int (7x+4)^{-2} \, dx$$
Using the formula for $$n \neq -1$$ with $$n = -2$$ and $$a=7$$:
$$\int (7x+4)^{-2} \, dx = \frac{(7x+4)^{-2+1}}{7(-2+1)} + C = \frac{(7x+4)^{-1}}{7(-1)} + C = -\frac{1}{7(7x+4)} + C$$
4. **Case (b):** $$m=1$$, so the integral becomes:
$$\int \frac{1}{7x+4} \, dx$$
Using the formula for $$n = -1$$:
$$\int \frac{1}{7x+4} \, dx = \frac{1}{7} \ln|7x+4| + C$$
**Final answers:**
- (a) $$\int \frac{1}{(7x+4)^2} \, dx = -\frac{1}{7(7x+4)} + C$$
- (b) $$\int \frac{1}{7x+4} \, dx = \frac{1}{7} \ln|7x+4| + C$$