What are the values of r and A sub 1 for this series? the sum from k is equal to 1 to 6 of 1 fourth
A
r is equal to 2 ; A sub 1 is equal to 1 fourthB
r is equal to 1 fourth ; A sub 1 is equal to 2C
r is equal to 1 fourth ; A sub 1 is equal to 6D
r is equal to 2 ; A sub 1 is equal to 6