Q. Find the 11th term of the geometric sequence 1,2,4,…Answer:
Identify Sequence Type: Identify the type of sequence. The given sequence is geometric because each term after the first is found by multiplying the previous term by a constant called the common ratio.
Determine Common Ratio: Determine the common ratio r of the sequence.The second term is 2 and the first term is 1. To find the common ratio, divide the second term by the first term.r=12=2
Use Formula for nth Term: Use the formula for the nth term of a geometric sequence to find the 11th term.The nth term of a geometric sequence is given by an=a1⋅r(n−1), where a1 is the first term and r is the common ratio.
Plug Values for 11th Term: Plug the values into the formula to find the 11th term.a11=1×211−1a11=1×210
Calculate 210: Calculate the value of 210. 210=1024
Conclude Final Answer: Conclude the final answer.The 11th term of the geometric sequence is 1024.