Question

find the sum of m terms of an AP. whose nth terms is given by an=5-6n​

Answer 1

Answer:

first term = a1 = 5-6n=5-6(1)=5-6= -1

2nd term = a2= 5-6n=5-6(2)=5-12= -7

common difference = d = a2-a1

-7-(-1)= -7+1= -6

nth term = a + (n-1)d

-1+(n-1)-6= -1 -6n+6= -6n+5

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