Find the value of x if 4^(x + 1) + 4^x = 320.

A2

B3

C4

D5

Explanation

Factor out 4^x: 4^x (4 + 1) = 320 => 5 * 4^x = 320 => 4^x = 64 => 4^x = 4^3 => x = 3.

Exam Relevance

Topic: Algebra
Subtopic: Exponents

Submitted by: mcqstutor Team More Mathematics MCQs →