please answer the above question in detail
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Answer:
43
Step-by-step explanation:
nth term = Sn - S(n-1)
= 2n2 + 5n - [ 2 ( n - 1 )2 + 5 (n - 1 ) ]
= 2n2 + 5n - [ 2 ( n2 + 1 - 2n ) + 5n - 5 ]
= 2n2 + 5n - 2n2 - 2 + 4n - 5n + 5
= 4n + 3
so 10th term = 4 × 10 + 3
= 43
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