Porisma

A hint to get started

Use definite integration by parts

Evaluate ∫12ln⁡x dx\int_1^2\ln x\,dx exactly.

CJC · Lecture · Example 5

The Teacher marks exactly, writes the integration-by-parts formula and verifies the u/v table. The Student working is blank after the equals sign; the filled Teacher derivation supplies each step.

Use the logarithm as the differentiated factor; integrate 1 to obtain x.

Read the worked solution