find the 8th term of the AP -2,-5,-8,
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Step-by-step explanation:
t1 = -2
t2 = - 5
t3 = - 8
d = t2 - t3
d = -5-(-2)
d = - 5+2
d = -3
common difference (d) = -3
t1= a = -2, d = -3, n= 8, tn= ?
tn = a + (n-1) ×d
tn = -2 + (8-1)× -3
tn = -2 + 7 × (-3)
tn = -2 - 21
tn = -23.
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