In an ap the first term is -4 the last term is 29 and the sum of all its terms is 150. Find d
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Answer:
d= +3
Step-by-step explanation:
Sn = n/2 {a+l}
150 = n/2 { -4 + 29 }
300/25 =n
n = 12
Tn = a + (n-1)d
29 = (-4) + (12-1)d
29+4 = 11d
33/11 =d
d= +3
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