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Grade: 12 
        
The fourth term of an AP is 4. Then the sum of the first 7 terms is
5 years ago

Answers : (1)

View Solution
bharat bajaj
IIT Delhi
askIITians Faculty
122 Points 
							
t4= 4

a + 3d = 4

S7= 3.5 x [2a + 6d]

S7= 7 (2)(a+3d) = 7(2)(4)

S7= 28
Thanks & Regards
Bharat Bajaj
askiitian faculty
IIT Delhi
5 years ago
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