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Determination the nth term of the …

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Determination the nth term of the AP whose 7th term is -1 and 16th term is 17. Please help to solve this question.

Posted by Smriti Prabha 5 years, 2 months ago

CBSE > Class 10 > Mathematics

2 answers

Nitesh Jogi 5 years, 2 months ago

A+6d=-1 /A+15d=17 A=-1-6d /-1-6d+15d =17 A=-1-6d /-1+9d=17 A=-1-6d /9d=18 ". /d=2 Putting the value of d in a, we get. A=-1-6(2) A=-13 An=a+(n-1)d An=-13 + (n-1) 2 An=-13 +2n-2 An=-15+2n Hence, the nth term of the ap is - -15+2n.

1Thank You

Jamna Thakur 5 years, 2 months ago

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Find the nature of quadratic equation x^2 +x -5 =0

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