Question

sum of consecutive five terms in A.P is 345 first term is______​

Answer 1

Answer:

as it is consecutive 5 terms we take the A.P as:

x , x+1,x+2 , x+3 , x+4

so in the question they are asking to find the 1st term i.e , "a"

so sum of terms = 345

therefore we can find common difference by subtracting 2nd term from first :  d = x+1 - x = 1

so we have : a= x(to find)

                      d=1

                   sum=345 , and

                       n=number of terms = 5

therefore we use the formula of sum of an AP which is:

S₅= n/2 ₓ [2a + (n-1)d]

which is : 345 = 5/2 ₓ [2x + (5-1)1]

which is equal to : 67 which is your final answer

hope this answers your question

plz mark brainliest