what is the S7 of the terms in the AP 1.0, 1.5, 2.0, 2.5?
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ishanoel:
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a= 1.0
d = a2-a1= 1.5 - 1.0 = 0.5
then by applying formula of sn
sn =n/2 (2a+(n-1)d)
putting values to it
s7 = 7/2 (2×1.0 +(7-1) ×0.5)
S7 = 7/2 (2.0+6×0.5)
s7= 7/2 (2.0 + 3.0)
s7 = 7/2 ( 5.0)
s7. = 7× 2.5
s7. = 17.5
ans =17.5
d = a2-a1= 1.5 - 1.0 = 0.5
then by applying formula of sn
sn =n/2 (2a+(n-1)d)
putting values to it
s7 = 7/2 (2×1.0 +(7-1) ×0.5)
S7 = 7/2 (2.0+6×0.5)
s7= 7/2 (2.0 + 3.0)
s7 = 7/2 ( 5.0)
s7. = 7× 2.5
s7. = 17.5
ans =17.5
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