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Find the 7th term of the geometric sequence shown below.

-10x^(6),10x^(11),-10x^(16),dots
Answer:

Find the 77th term of the geometric sequence shown below.\newline10x6,10x11,10x16, -10 x^{6}, 10 x^{11},-10 x^{16}, \ldots \newlineAnswer:

Full solution

Q. Find the 77th term of the geometric sequence shown below.\newline10x6,10x11,10x16, -10 x^{6}, 10 x^{11},-10 x^{16}, \ldots \newlineAnswer:
  1. Find Common Ratio: To find the 7th7^{\text{th}} term of a geometric sequence, we need to identify the common ratio (rr) between consecutive terms. We can find the common ratio by dividing the second term by the first term.\newlineCalculation: r=10x1110x6r = \frac{10x^{11}}{-10x^{6}}\newlineSimplification: r=x5r = -x^{5}
  2. Calculate 77th Term: Now that we have the common ratio, we can find the 77th term a7a_7 using the formula for the nth term of a geometric sequence: an=a1r(n1)a_n = a_1 \cdot r^{(n-1)}, where a1a_1 is the first term and nn is the term number.\newlineCalculation: a7=(10x6)(x5)(71)a_7 = (-10x^{6}) \cdot (-x^{5})^{(7-1)}\newlineSimplification: a7=(10x6)(x5)6a_7 = (-10x^{6}) \cdot (-x^{5})^6
  3. Simplify Expression: Next, we simplify the expression for a7a_7 by raising the common ratio to the 66th power.\newlineCalculation: a7=(10x6)×(x30)a_7 = (-10x^{6}) \times (x^{30})\newlineSimplification: a7=10x6+30a_7 = -10x^{6+30}\newlineSimplification: a7=10x36a_7 = -10x^{36}

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