Q. Find the 7th term of the geometric sequence shown below.−6x7,30x8,−150x9,…Answer:
Identify first term and ratio: To find the 7th term of a geometric sequence, we need to identify the first term (a1) and the common ratio (r) of the sequence.The first term (a1) is given as −6x7.
Calculate common ratio: Next, we find the common ratio r by dividing the second term by the first term.r=−6x730x8r=−5x
Use nth term formula: Now that we have the first term and the common ratio, we can use the formula for the nth term of a geometric sequence, which is an=a1×r(n−1), where n is the term number.We want to find the 7th term, so n=7.
Substitute values for 7th term: Substitute the values into the formula to find the 7th term. a7=(−6x7)×(−5x)7−1a7=(−6x7)×(−5x)6
Simplify expression for 7th term: Simplify the expression to find the 7th term.a7=(−6x7)×(15625x6)//(−5)6=15625a7=−93750x13 // Multiply the coefficients and add the exponents for x
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