Use differentials to approximate {{MATH_351}}. {{CMD_352}} Set {{MATH_353}}. We want to know {{MATH_354}}. Since {{MATH_355}}, we will set {{MATH_356}} and {{MATH_357}}. Write with me {{ENV_358}} Here we see a plot of {{MATH_359}} with the differentials above marked: {{CMD_360}} {{COMMENT_361}} {{ENV_362}} {{COMMENT_363}} {{CMD_364}} {{COMMENT_365}} {{CMD_366}} Now we must compute {{MATH_367}}: {{ENV_368}} Hence {{MATH_369}}. {{CMD_370}} {{CMD_371}}