Question

what is the 20th term of the sequence defined by An=(n-1)(2-n)(3+n)?​

Answer 1

SOLUTION

TO DETERMINE

The 20th term of the sequence defined by

$\sf{A_n = (n - 1)(2 - n)(3 + n)}$

EVALUATION

Here nth term of the sequence is given by

$\sf{A_n = (n - 1)(2 - n)(3 + n)}$

In order to find the 20th term of the sequence we put n = 20

Putting n = 20 we get

$\sf{A_{20} = (20 - 1)(2 - 20)(3 + 20)}$

$\sf{ \implies \: A_{20} = 19 \times ( - 18) \times 23}$

$\sf{ \implies \: A_{20} = - 7866}$

FINAL ANSWER

Hence the required 20th term of the sequence = 7866

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Answer 2

Answer:

= -7866

Step-by-step explanation:

an= (n-1) (2-n) (3+n)

put n= 20

a20= (20-1) (2-20) (3+20)

= 19 ( -18) 23

= -7866