help help help........
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siddhartharao77:
65?
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a16 = S16 - S15
Sn = n ( 2n +3)
a16 = 16( 2(16) +3) - 15( 2(15) +3)
= 16 ( 32 + 3) -15 ( 30 +3)
= 16× 35 - 15( 33)
= 560 -495
= 65
Sn = n ( 2n +3)
a16 = 16( 2(16) +3) - 15( 2(15) +3)
= 16 ( 32 + 3) -15 ( 30 +3)
= 16× 35 - 15( 33)
= 560 -495
= 65
Answered by
4
hope it helps you .........
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