Question

in an ap the first term is -4 , the last term of the ap is 29 and the sum is 150 find common difference

Answer 1

Answer:

Step-by-step explanation:

$a=-4\\L=29\\sn=150$

sn$sn=(n/2)*a+L\\150=(n/2)*(-4+29)\\150=(n/2)*(25)\\300/25=n\\n=12$$given data:\\a=-4\\sn=150\\sn=(n/2)*(2a+(n-1)*d)\\150=6*(-8+11d)\\150=-48+66d\\198/66=d\\d=3$