Question

The first term of Ap is 5. Last term is 45 and
the sum is 400. find number of terms and
common difference.​

Answer 1

Answer:

n=16,d=8/3

Step-by-step explanation:

Hii mate there is ur answer:

Given, a1=5, l=45, Sn=400

Sn=n/2(a1+l)

=)400=n/2(5+45)

=)400=n*50/2

=)400=25n

=)n=16

now, l=a1+(n-1)d

=)45=5+(16-1)d

=)40=15d

=)d=8/3

Hope it will help you

Answer 2

Answer:

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REFER TO THE ATTACHMENT FOR ANSWER

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