If the sum of the first n terms of an Ap is 4n-n2 what is first term? what is the sum of first two

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If the sum of the first n terms of an Ap is 4n-n2 what is first term? what is the sum of first two terms? what is the second term? similarly find the 3rd and 10th and nth terms

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Thank you sir your video made this problem easy for me to understand 🙏🏻

tusharmahajan
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Wow thanx for the video and keep going

shabreenbakthur
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an =a+(n-1)d
=3+(n-1)-2
=3-2n+2
=5-2n is nth term

kotakrishna