the 21st term of an AP the first 2 term are -3 &4
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Answered by
2
a = - 3
d = T2 - T1
d = 4 - (-3)
d = 4 + 3
d = 7
T21 = a + 20 d
= - 3 + 20(7)
= - 3 + 140
= 137
d = T2 - T1
d = 4 - (-3)
d = 4 + 3
d = 7
T21 = a + 20 d
= - 3 + 20(7)
= - 3 + 140
= 137
Answered by
4
a=(-3),
d=4-(-3)= 4+3=7
a21= a+20d
-3 + 20*7
= -3 + 140
= 137
d=4-(-3)= 4+3=7
a21= a+20d
-3 + 20*7
= -3 + 140
= 137
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