Q. Find the 10th term of the following geometric sequence.3,15,75,375,…
Find Common Ratio: Identify the common ratio r of the geometric sequence.To find the common ratio, we divide the second term by the first term.r=315=5
Use Formula for nth Term: Use the formula for the nth term of a geometric sequence.The nth term an of a geometric sequence can be found using the formula:an=a1⋅r(n−1)where a1 is the first term and r is the common ratio.
Calculate 10th Term: Calculate the 10th term using the formula.a10=a1×r10−1a10=3×510−1a10=3×59
Perform Exponentiation: Perform the exponentiation.59=5×5×5×5×5×5×5×5×559=1953125
Multiply First Term: Multiply the first term by the result of the exponentiation.a10=3×1953125a10=5859375