Math, asked by adhityakrishna06, 26 days ago

Please answer this question

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Answers

Answered by lucky4037

1

Answer:

Answer is -36

Step-by-step explanation:

Given: d= -12

a20= a+19d

a17= a+16d

a20-a17= (a+19d)-(a+16d)

= 19d-16d

= 3d

= 3(-12)

= -36

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