Join thousands of students who trust us to help them ace their exams!Watch the first video
Multiple Choice
Find the 10th term of the geometric sequence in which a1=5 and r=2.
A
5120
B
1280
C
10240
D
2560
Verified step by step guidance
1
Step 1: Recall the formula for the nth term of a geometric sequence: . Here, is the first term, is the common ratio, and is the term number.
Step 2: Substitute the given values into the formula. The first term is , the common ratio is , and we are looking for the 10th term (). The formula becomes: .
Step 3: Simplify the exponent in the formula. The exponent simplifies to . The formula now becomes: .
Step 4: Calculate . This represents 2 raised to the power of 9. Keep this value as is for now.
Step 5: Multiply by the result of . This will give the 10th term of the geometric sequence. The final value can be calculated by performing this multiplication.