Question

The first term of an Ap=5 and the last
term=65 ,the sum is 900. Find the number
of terms and d
​

Answer 1

Answer:

Step-by-step explanation:

sum of n terms=n/2{2a+l}

600=n/2{2*5+65}

600=n/2{75}

n=24

l=a+(n-1)d

65=5+(23)d

60=23d

d=2.6