Answer:
+7
Explanation:
![f(x)=3x^2-1/5x^5+7x^10](https://img.qammunity.org/2020/formulas/mathematics/middle-school/3q2df0mry7vpetsma9cxmks1dyba91nu4g.png)
To find leading coefficient , we look at the highest power of the polynomial
In the given f(x), we have x^2 , x^5 and x^10
x^10 has highest exponent 10
So the term that has highest exponent is +7x^10
The coefficient of that highest exponent term is the leading coefficient
So leading coefficient is +7