what is the answer? with description
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Hey !!!
sn = 3n + 2n²
S1 = 3×1 + 2×2²
s1 = 3 + 2×1
s1 = 5 =a (first term )
and similarly
S2 = 3n + 2n² ..
s2 = 3×2 + 2×2² .
s2 = 3×2 + 2×4
s2 = 14
and .. we know that
s2 - s1 = t2
14 - 5 = 9 = t2
Now we know that t2 - t1 = d (common difference)
hence , 9 - 5 = 4
option D) 4 is ur correct Answer
************************************
Hope it helps you !!!
@Rajukumar111
sn = 3n + 2n²
S1 = 3×1 + 2×2²
s1 = 3 + 2×1
s1 = 5 =a (first term )
and similarly
S2 = 3n + 2n² ..
s2 = 3×2 + 2×2² .
s2 = 3×2 + 2×4
s2 = 14
and .. we know that
s2 - s1 = t2
14 - 5 = 9 = t2
Now we know that t2 - t1 = d (common difference)
hence , 9 - 5 = 4
option D) 4 is ur correct Answer
************************************
Hope it helps you !!!
@Rajukumar111
vaishnavi190:
thank you
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