Q. Find the 12th term of the geometric sequence shown below.4x4,16x7,64x10,…Answer:
Identify common ratio: Identify the common ratio (r) of the geometric sequence by dividing the second term by the first term.Calculation: r=4x416x7=4x3
Use nth term formula: Use the formula for the nth term of a geometric sequence, which is an=a1⋅r(n−1), where a1 is the first term and n is the term number.Calculation: The first term a1 is 4x4, the common ratio r is 4x3, and the term number n is 12.
Substitute values: Substitute the values into the formula to find the 12th term.Calculation: a12=4x4⋅(4x3)11
Simplify expression: Simplify the expression by applying the power to the common ratio.Calculation: a12=4x4⋅411⋅x33
Combine constants and terms: Combine the constants and the like terms.Calculation: a12=412⋅x(4+33)
Calculate final value: Calculate the value of 412 and simplify the exponent for x.Calculation: a12=16777216⋅x37
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