Math, asked by satya226301, 8 months ago

3. The sum of n terms of an AP is 3n2+4n, find its nth term.
4. Find the value of sin45º.cos45°-tan 45º.cos 600
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Answers

Answered by PampaSingh

0

Answer:

Tn=6n-7

Step-by-step explanation:

Tn=3n²-4n-(3(n-1)²-4(n-1))

=3n²-4n-3(n²+1-2n)+4(n-1)

=3n²-4n-3n²-3+6n+4n-4

=6n-3-4

=6n-7

therefore, Tn =6n-7

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