From Ramanujan to calculus cocreator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve problems involving function inverses.
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How To: Find the Percent Given Two Numbers

How To: Find a number given Its percent

How To: Remember "greater than" & "less than" symbols

How To: Find the formula of a piecewise function given a graph

How To: Find the slope of a line given 2 points with fractions

How To: Figure out the domain & range of a piecewise function

How To: Find the Slope Given 2 Ordered Pairs

How To: Convert Fahrenheit to Celsius with a formula

How To: Do long division without a calculator

How To: Calculate Faster Than a Calculator

How To: Find a missing side of a triangle, similar to another

How To: Write a slopeintercept equation given an XY table

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Calculate the area of a parallelogram

How To: Convert between diameter and radius

How To: Round a decimal number to the nearest tenth in basic arithmetic

How To: Find how many toothpicks will be needed to form the nth figure in a sequence

How To: Multiply & Divide Numbers (Basic Elementary Math)

How To: Evaluate square roots

How To: Use ">" (greater than) and "<" (less than) symbols

How To: Find the Percent Given Two Numbers

How To: Find a number given Its percent

How To: Remember "greater than" & "less than" symbols

How To: Find the formula of a piecewise function given a graph

How To: Find the slope of a line given 2 points with fractions

How To: Figure out the domain & range of a piecewise function

How To: Find the Slope Given 2 Ordered Pairs

How To: Convert Fahrenheit to Celsius with a formula

How To: Do long division without a calculator

How To: Calculate Faster Than a Calculator

How To: Find a missing side of a triangle, similar to another

How To: Write a slopeintercept equation given an XY table

How To: Spend Money on a Graphing Calculator? Nah—Just Use This WebBased TI Emulator

How To: Calculate the area of a parallelogram

How To: Convert between diameter and radius

How To: Round a decimal number to the nearest tenth in basic arithmetic

How To: Find how many toothpicks will be needed to form the nth figure in a sequence

How To: Multiply & Divide Numbers (Basic Elementary Math)

How To: Evaluate square roots

How To: Use ">" (greater than) and "<" (less than) symbols
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