Antilog

Antilog

What is it?

Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2 says the scientific-notation exponent is 2, so x is of the form d x 10^2. On a table, you look up the mantissa to find d, then place the point using the characteristic.

In simple words

• Antilog undoes log.
• Antilog
• undoes
• Antilog

Important terms

Antilog: Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2 says the scientific-notation exponent is 2, so x is of the form d x 10^2. On a table, you look up the mantissa to find d, then place the point using the characteristic.

What you should learn

• Define and explain antilog.
• Apply antilog to a focused FBISE question.
• Check the answer for correct terms, evidence, working, and units.

Examples

• Antilog
• undoes
• Antilog

CORE UNDERSTANDING

Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2 says the scientific-notation exponent is 2, so x is of the form d x 10^2. On a table, you look up the mantissa to find d, then place the point using the characteristic.

EXAM APPLICATION

State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.

Full school-level explanation

Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2 says the scientific-notation exponent is 2, so x is of the form d x 10^2. On a table, you look up the mantissa to find d, then place the point using the characteristic.

Learn the idea, then use it:

WHAT — ANTILOG

Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2 says the scientific-notation exponent is 2, so x is of the form d x 10^2. On a table, you look up the mantissa to find d, then place the point using the characteristic.

HOW — Use the idea

Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check the result.

CORE UNDERSTANDING

Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2 says the scientific-notation exponent is 2, so x is of the form d x 10^2. On a table, you look up the mantissa to find d, then place the point using the characteristic.

Remember

• Antilog
• undoes
• Antilog

Examples

• Antilog
• undoes
• Antilog
• ANTILOG: Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 200. Characteristic 2

EXAM APPLICATION

State the correct term, connect it to the chapter rule or evidence, and use a clear example or calculation.

Remember

• correct term
• chapter link
• clear application

Examples

• Define first
• Show the rule or evidence
• Check units, labels, and conclusion

Remember

• Antilog
• undoes
• Antilog
• keep the ideas separate
• Antilog
• undoes
• Antilog
• correct term

Deeper understanding

Go beyond memorising Antilog. Connect the definition to reasons, relationships, exceptions, and exam wording.

Common mistakes

Exam focus

Core Idea

Key Points

Simple Check

How to Answer

Exam focus

Quick revision

• Antilog
• undoes
• keep the ideas separate
• Antilog: Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 20
• WHAT — ANTILOG: Antilog undoes log. From log_10 x = 2.3010 you get x = antilog 2.3010 = 10^2.3010, which is about 20
• HOW — Use the idea: Identify what is given, select this topic's rule or evidence, apply it one step at a time, and check

Do not merge antilog with a neighbouring idea that uses a different definition, rule, or method.

For long answers on Antilog: define clearly → explain the main parts → give one example → state one exam caution.