Question

Integrala din 18 pe x patrat?

Answer 1

∫ 18 / x dx = 18 ∫ 1/x² dx =  18·∫ x⁻² dx = 18· x⁻² ⁺¹  /(  -2 + 1)  = 18x⁻¹  / ( -1) 
= - 18 · 1 /x   + C

Answer 2

$\int\limits{ \frac{18}{x^2} } \, dx=18 \int\limits { \frac{1}{x^2} } \, dx =- \frac{18}{x}+C$